List of Transformers film series characters

The following is a list of characters featured in the Transformers film series, distributed by Paramount Pictures, and its related media appearances. Over 214 characters have appeared in the film franchise. For the list of the characters and their actors, see the list of Transformers film series cast and characters.

Autobots
In five films, 40 Autobots have appeared in the series. By the end of Dark of the Moon, ten Autobots remained on Earth. After five years, Cemetery Wind, Lockdown and TRF eliminated half of them. By the end of The Last Knight, all surviving Autobots (Optimus Prime, Bumblebee, Hound, Drift, Crosshairs, Cogman, Daytrader, Hot Rod, Sqweeks, Wheelie, Topspin, Trench, Bulldog, Grimlock, Slug, the Mini Dinobots, HMS Alliance Autobot and the Knights of Iacon) finally left Earth and returned to Cybertron.


 * Primes – The title of Prime was bestowed upon the civilian and spiritual leader of Cybertron. Among the known Primes are:
 * Sentinel Prime (voiced by Leonard Nimoy) is Optimus' mentor, a member of the Dynasty of Primes, the first leader of the Autobots and the captain of the Ark who transforms into a red and black Rosenbauer Panther airport crash tender fire truck. He was the leader of the Autobots before Optimus took place, during the war for Cybertron. As the main antagonist in the third film, he made a deal with Megatron to restore and rebuild Cybertron to bring the Pillars (including the Control Pillar) to Earth's Moon and later Chicago to use all Pillars together at Earth's atmosphere. However, after Bumblebee and Ratchet destroyed the Pillars, wounded by Megatron before Optimus kills him, he is later killed by Optimus with Megatron's shotgun for betraying himself. His head made a cameo at the KSI building, downloading his mind in Age of Extinction.
 * Optimus Prime (voiced by Peter Cullen) is the second, leader of the Autobots after Sentinel, the last Prime of Dynasty of Primes, one of the Guardian Knights, keeper of the Matrix of Leadership and the narrator of the series. He transforms into a 1997 red and blue Peterbilt 379 semi-trailer truck in the first three films, later a rusty 1973 Marmon semi cab-over truck and later a blue and red Western Star 5700XE Custom Phantom semi-truck. In the first film, Optimus Prime arrives on Earth with Ratchet, Ironhide, and Jazz trying to find the AllSpark. At Mission City, he kills Bonecrusher and battles Megatron, but Sam pushes the AllSpark into Megatron's chest, killing him and destroying the cube. As a result, Bumblebee spoke for the first time and Cybertron can no longer be restored. Afterward, Optimus and the other Autobots form an alliance with the humans and work closely with NEST. In Revenge of the Fallen, Optimus is killed by Megatron after a battle with him, Starscream and Grindor. Near the end of the film, he is later revived by Sam with the Matrix of Leadership and is fused with Jetfire, making him more powerful. Optimus Prime then faces The Fallen and Megatron. After a vicious fight, Optimus severely wounds Megatron and kills the Fallen. In Dark of the Moon, Optimus revives Sentinel Prime using the Matrix of Leadership and revealed he was the leader of the Autobots before him. But, Sentinel later betrays the Autobots and joins the Decepticons to restore Cybertron with the Pillars. During the battle in Chicago, Optimus kills Sentinel Prime (avenging Ironhide's death) along with all Decepticons, including the Driller, Shockwave, and finally Megatron. Optimus has finally added a trailer similar to his Generation 1 counterpart, and has been redesigned to look more heroic. The trailer contains enhanced weapons, a shield and a flight gear. Optimus loses his right arm to Sentinel Prime at the film's climax. In Age of Extinction, he is being hunted by both the Transformer-hating Harold Attinger and a cybertronian bounty hunter, Lockdown, who is working for the Creators to bring him to Cybertron. Soon after his capture and in the battle of Hong Kong, Optimus tames the four Legendary warriors (the Dinobots) and rides Grimlock to fight Galvatron (Megatron reincarnated) and his new army of man-made Transformers. After defeating Galvatron's army, he successfully kills Lockdown and Harold Attinger (avenging the deaths of Ratchet, Leadfoot, Sideswipe, Dino and Lucas). He then sets the Dinobots free and ask his fellow Autobots to protect Cade and his family before taking the Seed into space and going after the Creators. In The Last Knight, when frozen and floating past Jupiter, he arrives at Cybertron, a dead planet where he finds Quintessa, who gives him a red marking and wants to destroy Earth, which she reveals is an ancient enemy planet called "Unicron". She tells Prime that he must retrieve the staff to rebuild the planet, and brainwashes him to do her bidding. Prime's eyes turn purple and he becomes Nemesis Prime. Later, just as he is about to kill Bumblebee, Bee speaks for the second time. The sound of his friend's long lost voice causes Prime to return to normal, shown by his eyes turning blue again and his red marking disappeared. He rides with Dragonstorm into battle. After "killing" Quintessa and saving both worlds, Optimus and all Transformers finally leave Earth to return to Cybertron as it remains in orbit over Earth.


 * Bumblebee (voiced by Mark Ryan in the 2007 film and the Revenge of the Fallen video game, Erik Aadahl in The Last Knight) is an Autobot scout, later Optimus' second-in-command after Ratchet's death in the fourth film, Hot Rod's brother-in-arms and Sam's former guardian in the first three films. He also uses radio soundbites after losing his voice on Cybertron, when his throat begins healing after Ratchet fires a regenerative laser. Bumblebee transformed into a 1975-77 style Chevrolet Camaro, and upgrades into the 2006 model. Later at the end, his voice has spoken again. For Revenge of the Fallen, despite being repaired at the end of the 2007 film, Bumblebee's voice still uses radio soundbites to communicate. Sam tells Mikaela that Bumblebee's "playing it up". He also transforms into a newly 2009 Chevrolet Camaro. For Dark of the Moon, his vehicle mode became Chevrolet Camaro 2011, and featured a new body kit and paint job. For Age of Extinction, Bumblebee is now a modified vintage 1967 Chevrolet Camaro SS, and later on a 2014 Chevrolet Camaro concept. He appears after Optimus calls all the Autobots and has a rivalry with Drift (because Drift believes Bumblebee is too childish). He later aids Hound in a battle and rides Strafe. In The Last Knight, Bumblebee gets his voice back and fixed, but is accidentally given a female voice. However, near the end, his real voice spokes again to Optimus, turning him back to normal and snapping him out of Quintessa's brainwashing. Flashbacks reveal that he and Hot Rod were the first Autobots to arrive on Earth and fought alongside the Allied forces to fight the Nazi Party during World War II, and transformed to a Mercedes-Benz 770. He also knows Edmund from when they first met before he met Sam and has the ability to reassemble himself after being blown to pieces. In Bumblebee: The Movie, Bumblebee will transform into a Volkswagen Beetle.


 * Jazz (voiced by Darius McCrary in the first film, Andrew Kishino in Transformers: The Game, Troy Baker in Rise of the Dark Spark) is a first lieutenant and Optimus Prime's second-in-command who transforms into a modified silver Pontiac Solstice Custom Hardtop GXP. He is later killed by Megatron during the battle in Mission City.


 * Ironhide (voiced by Jess Harnell in the films, Mark Ryan in Transformers: The Game, Keith Szarabajka in Rise of the Dark Spark) is the Autobots' cantankerous but noble weapons specialist who has multiple weapons and transforms into a modified black 2006 GMC TopKick C4500 medium-duty truck. In Revenge of the Fallen, Ironhide takes down the Demolishor with Prime in Shanghai, then later takes over as Autobot Leader when Optimus is killed by Megatron in the forest. He leads the Autobots in the Desert Battle and helps Sam get to the pillars where Optimus lies. He is heavily damaged and forced to drop his heavy cannons during an air strike. He is given a new set of weapons in Dark of the Moon, by Que, and helps Sideswipe to take down The Decepticon Dreads, as they chase Sentinel to NEST. But Sentinel Prime betrays the Autobots, shooting the helpless Ironhide twice in the back with his Cosmic Rust Cannon, then once more in the chest, with the old Autobot warrior crumbling into dust. Ironhide also appeared in a photo in Age of Extinction and The Last Knight.


 * Ratchet (voiced by Robert Foxworth in the film, Fred Tatasciore in Transformers: The Game) is the Autobots' medical officer who transforms into a Los Angeles Fire Department search and rescue 2004 Hummer H2. For Dark of the Moon Ratchet's alt mode redesigned with painted green and white. In Age of Extinction, he is later killed by Lockdown and taken to KSI, melting his head to build remote controlled Transformers. His death was later avenged by Optimus when killing Attinger and Lockdown.


 * Sideswipe (voiced by André Sogliuzzo in Revenge of the Fallen, James Remar in Dark of the Moon, Fred Tatasciore in Transformers: The Game, John DiMaggio in the Revenge of the Fallen video game, Travis Willingham in Rise of the Dark Spark) is the Autobots' combat instructor who transforms into a silver Chevrolet Corvette Stingray concept. His arms sport detachable Cybertanium blades, and having wheels for feet, he moves around skating. In Dark of the Moon, Sideswipe's vehicle mode is upgraded into a convertible Corvette. While Sideswipe goes completely unmentioned in Age of Extinction, proper it appears that Sideswipe was intended to be killed off by the time of Age of Extinction, going by Topps Europe cards which describe a scene in which the surviving Autobots learn of and mourn his demise.


 * Jolt is a technician Autobot armed with a pair of electric whips who transforms into a blue Chevrolet Volt. He solely appears in Revenge of the Fallen, where he used his whips to fuse Jetfire's parts onto Optimus. Jolt did not appear on Dark of the Moon as he was killed by Shockwave before the film was released.


 * The Twins – The Twins are the result of a split Spark that resulted in two Autobots.
 * Skids (voiced by Tom Kenny) is an Autobot messenger and Mudflap's twin who transforms into a front white/pink ice cream truck, and later a green Chevrolet Beat. He has an oversized right arm. Despite the fact that Skids's was not shown in Dark of the Moon because he was cut from the film, the novelization and comic book adaptions showed that he was killed by Sentinel Prime.
 * Mudflap (voiced by Reno Wilson) is an Autobot infiltrator and Skids's twin who transforms into a back white/pink Ice Cream truck, and later a red Chevrolet Trax. Like Skids, he has an oversized left arm. Despite the fact that death Mudflap's was not shown in Dark of the Moon because he was cut from the film, the novelization and comic book adaptions showed that he was killed by Sentinel Prime.


 * Arcee Twins (all voiced by Grey DeLisle, holographic rider played by Erin Naas) – The Arcee Sisters are three Autobots that transform into motorcycles.
 * Arcee is a female Autobot who transforms into a pink Ducati 848. She is killed by a Decepticon. In Age of Extinction, Arcee is listed as deceased by Cemetery Wind.
 * Chromia is one of Arcee's sisters who transforms into a blue 2008 Suzuki B-King. She only component Arcee seen functional at last appearance in film, but Roberto Orci and Alex Kurtzman would claim that all sisters were killed at the behest of director Michael Bay.
 * Elita-One is another of Arcee's sisters who transforms into a purple MV Agusta F4 R312. She is killed by a Decepticon.


 * Jetfire (voiced by Mark Ryan in the film, Clive Revill in the Revenge of the Fallen video game, Troy Baker in Rise of the Dark Spark) is a Cockney-accented Seeker and former Decepticon turned Autobot who transforms into a Lockheed SR-71 Blackbird. His wounds and age have made him choose to fight on the side of the Autobots. He walks with a cane, which doubles as a battle axe, which is also the landing gear for his transformation into the Lockheed. He later sacrificed his spark to allow Optimus Prime to utilize his components and weaponry to destroy the Fallen.


 * Wheelie (voiced by Tom Kenny) is a Decepticon spy turned Autobot, like Jetfire, and a partner of Brains who transforms into a blue radio-controlled toy monster truck and speaks with a Brooklyn accent. In The Last Knight, Wheelie survived and joins with the other Autobots in Cade's junkyard.


 * Brains (voiced by Reno Wilson) is a small and intelligent Decepticon drone turned Autobot and a partner of Wheelie who transforms into a Lenovo ThinkPad Edge laptop computer, and he is friends with Wheelie. In Age of Extinction, Brains reappeared, but lost his right leg after crashing into a river inside a Decepticon Ship.


 * Mirage (voiced by Francesco Quinn) is an Autobot spy who has blades on his arms and transforms into a red Ferrari 458 Italia and speaks with an Italian accent. He was credited as Dino.


 * Wheeljack (voiced by George Coe in the film, Erik Passoja in Transformers: The Game, Jamie Alcroft in the Dark of the Moon video game) is an eccentric Autobot scientist who speaks with an Irish accent, whose head design resembles Albert Einstein in reference to his genius and he transforms into a blue Mercedes-Benz E550. He is an inventor and is seen giving the Autobots weapons and equipment he has created such as a gun for Ironhide, grappling gloves and boomsticks. He is later killed by Barricade when Soundwave orders his execution. He was credited as Que/Wheeljack.


 * The Wreckers are a trio of Autobots who transforms into NASCAR Sprint Cup Series Gen-5 Chevrolet Impala stock cars as disguises. Two represent Hendrick Motorsports and one represents Earnhardt Ganassi Racing. They also work on the Autobots' ship Xantium.
 * Leadfoot (voiced by John DiMaggio) is the Wreckers' leader who transforms into an armored version of the #42 Earnhardt Ganassi Racing Target car driven at the time by Juan Pablo Montoya, and speaks with a Cockney accent. In Age of Extinction, he appears in drone video footage, being attacked and killed by Cemetery Wind agents. Cade, who hacks a Cemetery Wind's spy drone, shows the footage to the Autobots, compelling Hound to salute his fallen friend.
 * Roadbuster (voiced by Ron Bottitta) is the second-in-command of the Wreckers who transforms into an armored version of the #88 Hendrick Motorsports AMP Energy/National Guard car driven at the time by Dale Earnhardt, Jr., and speaks with a Scottish accent.
 * Topspin (voiced by Steven Barr) is one of the three Wreckers who transforms into an armored version of the #48 Hendrick Motorsports Lowe's/Kobalt driven by Jimmie Johnson, and appears to have claws on his hands. In The Last Knight he is seen in Cuba under the protection of Seymour Simmons and credited as Volleybot.


 * Hound (voiced by John Goodman in the films, Daniel Ross in Transformers: The Game) is an Autobot commando who transforms into a dark green Oshkosh Defense Medium Tactical Truck in Age of Extinction. His robot mode is modeled after a human commando with a bushy beard and bullet which he smokes like a cigar. Hound is the heavy weapons expert of the small group carrying various types of guns, as well as grenades and a knife, with him. Hound returns in The Last Knight as an olive green Mercedes-Benz Unimog military tactical ambulance and as a new medic following the death of Ratchet.


 * Drift (voiced by Ken Watanabe) is an Autobot tactician, a former Decepticon and a Triple Changer who transforms into a black and blue 2013 Bugatti Veyron Grand Sport Vitesse and a Cybertronian helicopter in Age of Extinction. He speaks with a Japanese accent. His robot is modeled after a samurai warrior with a braided beard. Drift is partnered with Dinobot Slug, who he rides into battle at the film's climax. Drift returns in The Last Knight as a black and red Mercedes-AMG GT.


 * Crosshairs (voiced by John DiMaggio) is an Autobot paratrooper and sniper who transforms into a green 2014 C7 Corvette Stingray in Age of Extinction. His robot mode is modeled after a human paratrooper with goggles, sidearm machine pistols, and even a trench coat which can act as a parachute. He also rides with Dinobot Scorn into battle at the film's climax, and later nicknamed him "Spike". Crosshairs returns in The Last Knight as a green 2016 Chevy Corvette C7 Stingray.


 * The Dinobots are the very large Cybertronian Knights who transform into giant mechanical spiked dinosaurs. In Age of Extinction, they were captured inside of their ship, which Lockdown took over as his prison ship until they were freed by Optimus in the end.
 * Grimlock (voiced by Gregg Berger in Rise of the Dark Spark) is the leader of the Dinobots who transforms into a horned mechanical fire-breathing Tyrannosaurus, and formerly partnered with Optimus to ride on him.
 * Strafe is one of the Dinobots who specializes in assault infantry and transforms into a mechanical two-headed, two-tailed Pteranodon and formerly partnered with Bumblebee to ride on him.
 * Slug is the savage destroyer amongst the Dinobots who transforms into a mechanical spiked and bestial Triceratops and formerly partnered with Drift to ride on him.
 * Scorn is the Dinobots' demolition specialist who appears in Age of Extinction and transforms into a mechanical three-sailed Spinosaurus and formerly partnered with Crosshairs to ride on him and name him "Spike". Scorn has a right arm and a left tail-whip arm.
 * Mini Dinobots are a group of small counterparts of Grimlock, Strafe and Slug. They appeared with Grimlock and Slug, living in Cade's junkyard.
 * Mini-Grimlock is a smaller counterpart of Grimlock. He is nicknamed "Baby T" and "Sharp-T" by Cade.
 * Mini-Stafe is a smaller counterpart of Strafe. He is nicknamed "Pterry" by Cade.
 * Mini-Slug is a smaller counterpart of Slug. He is nicknamed "Tops".


 * Hot Rod (voiced by Omar Sy) is Bumblebee's brother-in-arms, an Autobot protector and Viviane‘s guardian who was first seen as a Citroën DS in disguise, and then transforming into a futuristic orange and black 2017 Lamborghini Centenario sports car. Rodimus speaks with a French accent to which he doesn't like and doesn't know how to get rid of. In flashbacks, he and Bumblebee helped fight the Nazi's during World War II.


 * Sqweeks (voiced by Reno Wilson) is a small Autobot and Izabella's only friend struggles to communicate and has trouble transforming due to prior damage and has the ability to change his new arm into a gun.


 * Cogman (voiced by Jim Carter) is a human-sized sociopathic Autobot Headmaster who acts as Sir Edmund Burton's butler. Despite his status, his Headmaster ability is not demonstrated.


 * Canopy is an Autobot refugee who can pose himself as a shielding pile of rubble and is friends of Izabella and Sqweeks. He is mistakenly shot down and killed by TRF, believing him to be a Decepticon trying to harm kids who had trespassed into a restricted zone. As Izabella vowed to repair him, Canopy implored Izabella to run and thanks her for the companionship.


 * Daytrader (voiced by Steve Buscemi) is an Autobot scavenger who transforms into a cloaked rusty Mercedes-Benz LK Model 1920 dump truck. He is seen arriving at Cade's junkyard after salvaging old Transformers parts from old battles for profit and finding a ship for the Autobots to leave.


 * Trench is an Autobot who resembles the same body of Scrapper and transforms into a yellow front end loader excavator. He made a cameo in The Last Knight, transforming when the Decepticons are approaching Cade's junkyard, forcing Cade, Autobots and the others to escape. His fate is unknown.


 * Burton's Autobot Allies – The following Autobots are allied with Sir Edmund Burton and Cogman.
 * Bulldog (voiced by Mark Ryan) is an Autobot veteran who acts as sentry for Sir Edmund Burton's castle and transforms into an army green Mark IV tank. He was a veteran from World War 1 and World War II, and suffers with "robot dementia".
 * Lieutenant (voiced by Mark Ryan) resembles a tweaked version of Jetfire. He made a cameo in The Last Knight within Edmund's castle in response to TRF's arrival, but died at old age.
 * An HMS Alliance submarine Autobot takes Cade, Viviane, Cogman and Bumblebee to the Knights' sunken ship to recover the Staff of Merlin in The Last Knight who doesn't transform on screen, but is mentioned to being a Transformer by Santos and was referred to as "she."

Decepticons
In five films, 48 Decepticons have appeared in the series.


 * The Fallen (voiced by Tony Todd in the film, James Arnold Taylor in the video game), formerly Megatronus, is a rogue Prime of Dynasty of Primes, the founder and the first Decepticon, and Megatron's mentor. In 17,000 B.C., he and his brothers set the Harvester on Earth, but when the humans are discovered the other Primes refuse to activate the Harvester, but the Fallen betrays his brothers, stealing the Matrix of Leadership, the only thing that can turn on the Sun Harvester. Luckily, his brothers stopped him and took the Matrix and hid it from him. Years after his betrayal, he is shown aboard the Nemesis, which was crash landed on one of Saturn's moons, in some kind of stasis. He is capable of opening Space Bridges at will, and he also has the ability to wield telekinesis, powers restricted to the original Dynasty of Primes. He also wields a void scepter as a melee weapon. During the film, the Fallen seeks to invade Earth with an army of Decepticons and activate the Sun Harvester for an alternative Energon source as well as to get revenge on humanity and the Autobots for his defeat after taking the Matrix of Leadership. Landing on Earth, he uses Earth's telecommunications grid to force the humans to hand over Sam Witwicky, which will lead the Decepticons to the Matrix of Leadership. During the final battle, the Fallen steals the Matrix from a revived Optimus Prime and starts up the Sun Harvester, declaring revenge is his at last. However, as the Sun Harvester charges, Jetfire sacrifices himself in order to let Optimus utilize his components. After Rachet and Jolt fuse Optimus with Jetfire's weaponry, Optimus Prime destroys the Sun Harvester and the Fallen is finally killed by Optimus Prime.


 * Megatron (voiced by Hugo Weaving in the 2007 film up until Dark of the Moon, Frank Welker in the video games and The Last Knight, Fred Tatasciore in the Dark of the Moon and Rise of the Dark Spark video game) is the leader of the Decepticons. Thousands of years ago, Megatron had crash-landed on Earth in the Arctic in his quest to obtain the AllSpark. When he is defrosted, he keeps his original alien jet form out of vanity. During the final battle in Mission City, Megatron kills Jazz, the Autobot top lieutenant, and duels with Optimus Prime, quickly gaining the upper hand. After being weakened by human fighter jets, Megatron is killed by Sam, who pushes the AllSpark into his spark core, avenging Jazz's death. Later, Megatron's body is dumped into the deepest part of the Laurentian Abyss. In Revenge of the Fallen, Megatron returns. Despite Michael Bay's initial claims of him not returning after he was killed and thrown into the Laurentian Abyss in the first film, Megatron is resurrected by the Constructicons with a shard of the AllSpark. Upon being revived, Megatron gains a new alternative mode as a Cybertronian flying tank. He kills Optimus Prime and later pursues Sam Witwicky for vengeance and to obtain the AllSpark knowledge the human possess within his mind. In Egypt, Megatron fights a resurrected and revived Optimus, but is overpowered and badly damaged, losing the right side of his face and his right arm in the process. Megatron then watches as the Fallen is destroyed. Afterward, Megatron retreats with Starscream, swearing revenge. In Dark of the Moon, despite his right arm and his half face repaired at the end of last film, Megatron changes his vehicle mode to an armored rusty Mack Titan 10-wheeler fuel tank truck equipped with heavy weaponry and goes into hiding in Tanzania. After Optimus Prime destroyed half of his face in Revenge of the Fallen, Megatron sometimes hides it by using a cowl. Instead of using a Fusion Cannon integrated into his arm, he wields a hand-held fusion shotgun similar to a Lupara. It is revealed that Megatron made a secret deal with former Autobot leader Sentinel Prime, to invade Earth with an army using Space Bridge pillars and use humanity to rebuild their damaged planet together. However, Megatron is betrayed by Sentinel and has command of the Decepticons taken from him. During the battle in Chicago, Sam's girlfriend Carly goads him back into action; Megatron ambushes and cripples Sentinel. When Cybertron's trip through the Space Bridge fails, Megatron attempts to make a false truce with Optimus, but the latter sees through the ruse and attacks his eternal foe, tearing off Megatron's head with a battle axe. In Age of Extinction, Megatron's head is seen in at KSI, where a captive Brains discovers that Megatron's mind is still alive and in a deep stasis. Megatron silently manipulates Joshua Joyce and his creation of the artificial Transformers as part of his conscious gets placed into Galvatron. In The Last Knight, concept art for him has been released has revealed him to resemble a darker, more monstrous version of Optimus Prime's knight form, with a similar faceplate to Optimus's own and a horned helmet vaguely resembling his G1 incarnation helmet. He is further revealed to have his signature forearm-mounted fusion cannon which can also act as a flamethrower and a knightly sword like Optimus, further emphasizing the enmity between the two. His vehicle mode for the film has been revealed to be a Cybertronian jet, similar to G1 Cyclonus' jet mode. In the film upon somehow being rebuilt, he searches for the talisman to find Quintessa's staff. Later in the final battle on Cybertron, he is defeated by Optimus when Optimus cuts off his right arm as he did in Revenge of the Fallen, and is kicked through a wall, sending him falling back to Earth.


 * Starscream (voiced by Charlie Adler in the film, Daniel Ross in Transformers: The Game, Steven Blum in the Dark of the Moon video game, Sam Riegel in Rise of the Dark Spark) is Megatron's second-in-command who transforms into a Lockheed Martin F-22 Raptor jet. A post-credits scene of him escaping Earth and flew into space, and later returns in Revenge of the Fallen bearing Cybertronian tattoos and symbols on his body and commanding a new Decepticon army. In Dark of the Moon, Starscream is finally killed by Sam Witwicky who blows off his head with a small bomb that was designed and given to him by Que. In The Last Knight, his head was seen being boasted by Daytrader, who claims he found it in Buffalo, New York. Later it is seen being held by Megatron reminiscing about him.


 * Blackout (voiced by Noah Nelson in Transformers: The Game) is a first-strike Decepticon and the first Transformer seen who transforms into a MH-53J Pave Low III helicopter. He is extremely loyal to Megatron and uses his cannon in his chest, and the blades. Blackout is later killed by human fighter jets and Major Lennox, who shoots him in his spark.
 * Scorponok is a Decepticon, a mechanical scorpion and a minion of Blackout, attached to his back, who is able to dive under sand or other soft surfaces and burrow to attack. After being damaged by the gunships and losing his tail, Scorponok retreats beneath the sand. In Revenge of the Fallen Scorponok returns, where he wounds Jetfire, but Jetfire crushes his head, finally killing him.


 * Barricade (voiced by Jess Harnell in the 2007 film, The Last Knight and Bumblebee: The Movie, Keith David in Transformers: The Game, Frank Welker in Dark of the Moon) is a Decepticon scout who transforms into a black Saleen S281 police car, whom Frenzy guides to Sam. He is shown as Bumblebee's rival. Barricade later returned in Dark of the Moon. He appears in the Battle of Chicago last seen being shot in the head by a group of soldiers after a boom-stick blew off one of his legs. Barricade returns in The Last Knight, transforming into a 2016 Ford Mustang police car. Barricade's robot form as revealed in released concept art, has become sleeker and more streamlined than his robot mode in his previous appearances. He also sports an arm-mounted gatling gun on his left arm, and wields a baton and a pistol. Additionally, he possesses brass knuckles with the words "punish" and "enslave" engraved onto them. Barricade return in Bumblebee: The Movie.
 * Frenzy (voiced by Reno Wilson) a small Decepticon spy and a minion of Barricade who transforms into a silver PGX Boombox and later in his head mode, a black Nokia 8800 without his body. When attacking a group of humans in the control rooms, Frenzy accidentally kills himself when one of his own disc blades goes full circle and slices his head in two. In Revenge of the Fallen, Frenzy's head is seen in the basement of Simmons' mother's deli.


 * Bonecrusher (voiced by Jimmie Wood in the film, Daniel Riordan in Transformers: The Game) is a very hate-fueled and a cantankerous Decepticon who transforms into a Buffalo H Mine-Protected vehicle. When battling Optimus on the highway to Mission City, he was killed by Optimus after his right arm is cut off.


 * Brawl/Devastator (voiced by David Sobolov in Transformers: The Game) is a ferocious Decepticon demolition specialist who transforms into an army green M1 Abrams. He has 4-tube missile launchers on each shoulder, a rotary machine gun and two blades on his left arm and a quad-mounted machine gun on his right arm. During the battle in Mission City, he loses his left arm by Ratchet and was knocked out by soldiers. However, he gets back up and fights. While firing his arm at soldiers, he is finally killed by Bumblebee.


 * Soundwave (voiced by Frank Welker in the films, Peter Jessop in the Revenge of the Fallen video game, Isaac C. Singleton, Jr. in the Dark of the Moon and Rise of the Dark Spark video games) is the Decepticon Communication Officer and one of Megatron's most loyal lieutenants. In Dark of the Moon, Soundwave transforms into a silver Mercedes-Benz SLS AMG who poses as a car given to Carly by Dylan. He is later killed by Bumblebee in the battle of Chicago. Soundwave return in Bumblebee: The Movie.
 * Ravage (vocal effects provided by Frank Welker) is a Decepticon infiltration expert and a minion of Soundwave that resembles a large one-eyed Jaguar. He is later killed and ripped by Bumblebee. Ravage return in Bumblebee: The Movie.
 * Laserbeak (voiced by Keith Szarabajka) is a Decepticon infiltration expert and a minion of Soundwave that resembles a mechanical condor. Like his predecessor, Ravage, Laserbeak serves as a scout and spy for the Decepticons, and transforms into a Gyrodyne and a variety of electronic devices, such as a desktop computer, and an audio system and even a child size pink version of Bumblebee. He is later killed on a Decepticon ship piloted by Bumblebee during the Battle of Chicago.


 * The Constructicons are a Decepticon sub-faction of Decepticons who transform into construction vehicles in Revenge of the Fallen.
 * Devastator (voiced by Frank Welker in the film, Fred Tatasciore in the video game) is a 46 ft tall (hunched over) massive robot formed by several combining construction vehicles, who walks in a four-legged fashion resembling a gorilla. He is physically unable to stand up straight. If he did, would be 100 ft to 120 ft. His jaws can open up to form some sort of suction vortex, and he has grappling hooks he is seen using to climb a pyramid. A Combiner, Devastator is the Decepticons' ultimate weapon. He is destroyed by a prototype railgun during the battle in Egypt. The 9 combined vehicles of Devastator are Mixmaster, Scavenger, Scrapper, Hightower, Second Bulldozer, Overload, Long Haul, Yellow Dump truck & Rampage.
 * Demolishor (voiced by Calvin Wimmer in the film, Fred Tatasciore in the film) is a large Constructicon who transforms into a white with red stripes Terex O&K RH 400 hydraulic mining excavator. In robot mode, his treads turn into huge wheels, enabling him to roll either on the two of them, or only on the front one, with the rear lifted behind his head. He is killed when Optimus Prime shoots him in the right eye at point blank range.
 * Rampage (voiced by Kevin Michael Richardson) is a Constructicon who transforms into a red Caterpillar D11T bulldozer with model number M930, while in the toyline, he is a yellow Caterpillar D9L bulldozer, whose Robot mode is based after the Beast Wars incarnation of the Same name. His robot mode resembles an upright-standing snake with his treads coming out of his hands, which he uses as whips. He is later killed by Bumblebee. In the film, he is credited as Skipjack.
 * Mixmaster (voiced by Daniel Ross in Transformers: The Game, David Boat in the Dark of the Moon video game) is a Constructicon who transforms into a black and silver Mack concrete mixer truck. He is briefly seen to have a third "battle mode" which appears to be a gun emplacement. According to his toy bio, he is an expert in chemistry and explosives who makes explosives and poisons for the other Decepticons' weapons. Some of the concept art shows him as a McNeilus mixer truck. He is killed by Jetfire.
 * Long Haul (voiced by Neil Kaplan in the video game) is a Constructicon who transforms into a green Caterpillar 773B dump truck. Long Haul's robot mode was designed by freelance artist Josh Nizzi as fan art of the original character, by the time Revenge of the Fallen had just been greenlit. The fan art impressed Bay enough to hire him on to the film. He is killed during an air strike in the battle of Egypt. Although in the movie Long Haul's alt mode is a Caterpiller 773B, a relatively small truck, Nizzi had originally meant Long Haul to be a Caterpillar 797, one of the largest dump trucks in the world.
 * Scrapper is a Constructicon who transforms into a yellow Caterpillar 992G scoop loader. He is seen to be able to use his left arm as a chain mace. He is killed during an air strike in the battle of Egypt.
 * Scavenger is a large Constructicon who shares the same model of Demolishor. Red excavator Terex O&K RH 400. He appeared in the final battle of Egypt, where he and the Constructicons form Devastator, but soon killed by a prototype railgun, alongside the Constructicons.
 * Overload is a Constructicon who transformed into a red Komatsu HD465-7 Tractor Truck articulated dump truck. Armed with hooks and pincers, like a crab. He appeared in the final battle of Egypt, where he and the Constructicons form Devastator, but soon killed by a prototype railgun, alongside the Constructicons.
 * Hightower is a Constructicon who transformed into a yellow KOBELCO CK2500 II crawler crane. He is only seen in vehicle mode. Resembles a mechanical T-Rex. He appeared in the final battle of Egypt, where he and the Constructicons form Devastator, but soon killed by a prototype railgun, alongside the Constructicons.
 * Scrapmetal is a Constructicon who transforms into a yellow Volvo EC700C crawler excavator fitted with a Stanley UP 45SV attachment. Armed with two claws that is mounted with an Energon Blaster floating on a body of the enemy several million volts of electricity. He joins Mixmaster, Long Haul, and Rampage on the retrieval mission to recover Megatron. Then during Megatron's retrieval he is ripped apart by the others in order to provide components for Megatron. His model design is similar to that of Scrapper.


 * Sideways (voiced by John DiMaggio in the video game) is a Decepticon surveillance agent who transforms into a silver Audi R8 hiding with Demolishor in Shanghai, China until he is discovered by the Autobots. After getting chased by Arcee, Chromia and Elita-One, He is killed by Sideswipe in Revenge of The Fallen.


 * Reedman (voiced by Frank Welker) is a one-eyed razor-thin robot. Reedman appears when at a certain point in the film, Ravage is seen deploying a load of marble-sized "microcons" that adopt an intermediate bug-like robot form, and end up grouping together to form Reedman. Reedman's extremely thin frame serves him as his main ability, by making him virtually invisible as long as he is facing directly at his enemy.


 * Scalpel (voiced by John Di Crosta) is a small spider-like medic and scientist, also known as The Doctor, equipped with tools who transforms into a microscope. He first appeared deployed from Ravage to revive Megatron. He is seen again, used to extract information from Sam Witwicky. In Dark of the Moon, similar looking Deceptions are seen crawling over and repairing Megatron's damaged head.


 * Alice (portrayed by Isabel Lucas) is a Decepticon Pretender who intercepts Sam Witwicky in college, but is later killed by Mikaela Banes.


 * Grindor (voiced by Frank Welker in the film, Fred Tatasciore in the video game) is a Decepticon close combat specialist and master strategist who transforms into a CH-53E Super Stallion helicopter, and shared the same model design as Blackout. His face is ripped apart by Optimus Prime in Revenge of The Fallen.


 * Buffalo MPV Decepticon is a Decepticon who transforms into a Buffalo H Mine-Protected vehicle and shared the same model design as Bonecrusher, but his body looks a little different including a missing shovel on the back in robot form. This Decepticon take part in the battle in Egypt and engaged Ironhide in a brief firefight. He was presumably destroyed during the United States Air Force's airstrike on ground targets.


 * An Insecticon is a small insect-like Decepticon resembling a mechanical beetle. In Revenge of the Fallen during the final battle of Egypt, an Insecticon is seen searching for Sam Witwicky before being deactivated by Sam himself. In Age of Extinction, Insecticons are seen assisting Brains in corrupting KSI's Galvatron with Megatron's consciousness.


 * Decepticon Protoforms – A large various Decepticon army who appeared in each film sequels' final battles. In Dark of the Moon, they have been seen riding Cybertronian starfighters that can transform into Cybertronian hovercrafts and several large ships.


 * Hatchlings – The newborn Decepticons. In Revenge of the Fallen, the hatchlings have been seen on board the Nemesis, but died due to a lack of Energon. They later appeared in Dark of the Moon as pets of Megatron.


 * Shockwave (voiced by Frank Welker in the film, Steven Blum in Rise of the Dark Spark) is an emotional Decepticon assassin. He is killed in the Battle of Chicago by Optimus. Shockwave transforms into a Cybertronian self-propelled artillery vehicle. Like his original G1 appearance, Shockwave's head features a single red eye, and has a gun in place of one of his hands, with a tube connecting it to his back. Shockwave return in Bumblebee: The Movie. Visual effects supervisor Scott Farrar said that the lack of eyes and mouth in Shockwave's design means "you have to read Shockwave through just the emotions of his face, almost like a silent-era film star," which caused the eye to have an intrinsic design, with a lens, a moving iris and an oscillating light.
 * The Driller is Shockwave's pet. It is a giant, tentacled Mongolian death worm-like Cybertronian creature, which is used for drilling purposes. It is also Cybertron's most feared predator. The Driller appeared, attacking and killing NEST soldiers, tried to get the engine part of the Ark, but Optimus stops it and retreats. Later in the Battle of Chicago, Shockwave commands his pet to tear down a large building, but the beast is decapitated and killed by Optimus Prime.


 * Igor (voiced by Greg Berg) is a deformed Decepticon that scurries about Megatron at his base in Africa. He is modeled after the head of Long Haul.


 * The Dreads are a group of Decepticons who follow the Autobots back from the moon and transform into black Chevrolet Suburban emergency vehicles. They also seem to vaguely resemble the Predator. They attacked Sam, Bumblebee, Sideswipe, and Dino on the highway and later fought Ironhide and Sideswipe by throwing their explosive darts at the Autobots.
 * Crankcase is the leader of the Dreads, and he specializes in stealing information. Crankcase was killed by the Autobot Ironhide with the help of Sideswipe.
 * Crowbar (voiced by Jimmie Wood) specializes in getting into secured areas and systems. He is killed by Ironhide.
 * Hatchet is a master strategist for the Decepticons, who has an animal-like robot mode. He is killed by Bumblebee and Dino on the highway.


 * Loader is a Decepticon who made a cameo and later killed in the battle of Chicago. His vehicle form is a Superfund security truck and does not transform into his robot form.


 * Devcon is a quadrupedal Decepticon in Chicago of Dark of the Moon. He is killed by the combined firepower of the Wreckers and NEST soldiers. Devcon's concept art shows him transforming into a Russian missile launcher.


 * A Watch-bot is a small scorpion-like Decepticon spy who transforms into a wristwatch in Dark of the Moon. It was used by Dylan Gould before it was killed by its unintentional wearer Sam Witwicky.


 * The KSI Drones are the human-made Transformers that were commissioned by Attinger and built by KSI. They have the ability to change their forms molecularly instead of just transforming. They were built with the metal extracted from the remains of the dead Transformers. They were also modeled after both Autobots and Decepticons. They were originally mindless drones remote-controlled by humans, but later were granted autonomy by the Megatron possessed Galvatron, organizing them into a new Decepticon army. They fought in the battle of Hong Kong but were soon destroyed by the Autobots, Cade Yeager and the Dinobots. According to Joshua Joyce, KSI made about fifty molecularly transforming robot.
 * Galvatron (voiced by Frank Welker) is a KSI prototype modeled after Optimus Prime, but corrupted and possessed by Megatron who transforms into a black and grey 2014 Freightliner Argosy cab over truck. After Optimus Prime killed Lockdown, Galvatron got away.
 * Stinger is a KSI prototype modeled after Bumblebee, who later becomes a Decepticon and transforms into a red and black 2013 Pagani Huayra. He is later killed after having his head blown off by Bumblebee and eaten by Strafe. His role in Galvatron's army appears to be the sabotage specialist.
 * Junkheap is a KSI prototype who later becomes a Decepticon and transforms into a green Isuzu Giga garbage truck of Waste Management, Inc. He has the ability to split into three different drones that share the same single consciousness at will. They were killed by Hound. They also made cameos in the beginning of The Last Knight.
 * Traxes are the KSI prototypes who are modeled after Roadbuster and transform into multiple different colored Chevrolet Traxes. They appear to have green, red, purplish blue, orange or yellow visors in their faces and blades in their arms. Many are killed by the Autobots and Dinobots.
 * "Two Head" are the two-headed KSI prototypes modeled after Shockwave, who later become Decepticons, with a left head with a horn and a right head with two horns and colored purple. They are killed by Hound and Optimus.
 * "KSI Bosses" are KSI prototypes who are modeled after Barricade with turbines on their backs. They are killed by the Autobots and Dinobots.


 * Mohawk (voiced by Reno Wilson) is a loyal Decepticon footsoldier who transforms into a Confederate Motorcycle. His TRF description states that he is IN CUSTODY, and that he is skilled with knives. Despite the fact that his alt mode is a relatively small motorcycle, his TRF description also states that Mohawk is 14 feet tall in robot mode. He is left behind after the Decepticons retreat from Cade and the Autobots before being killed by Bumblebee.


 * Dreadbot is a Decepticon thug who shares the same body of Crowbar and transforms into a rusty Volkswagen Type 2 with Christmas lights in his right arm. His TRF description states that he is IN CUSTODY, and that he owns a unique Cybertronian firearm. He is soon killed and eaten by Grimlock.


 * Nitro Zeus (voiced by John DiMaggio and Steven Barr) is a merciless showboating Decepticon hunter who transforms into a JAS-29 Gripen Fighter Jet. He shares the same body design of both new model of a "KSI Boss" and head of Shockwave, due to resemblance ot Shockwave from DOTM. His TRF description states that he is IN CUSTODY, is enraged by the death of Shockwave, and has a vast array of weaponry. Nitro is later killed after having his head blown off by Bumblebee.


 * Berserker is a vicious Decepticon commando who shares the same body of Crankcase with a X marking on his chest and only made a cameo in The Last Knight. His TRF description states that he is TO BE RELEASED UNDER NO CIRCUMSTANCES, and that he is a homicidal sociopath. He was selected by Megatron in a deal with TRF, but they refused, claiming that Berserker is too dangerous to be released, so Megatron selects Onslaught instead.


 * Onslaught (voiced by Travis Willingham in Rise of the Dark Spark) is a Decepticon tactician who shares the same body of his twin brother, Long Haul, resembles Brawl from the first film and transforms into a green Western Star 4900SF Tow Truck with Autobot and human symbols on the crane arm scratched off. His TRF description states that he is IN CUSTODY, and that he is developing a weapon called The Decapitator. He was selected by Megatron after refusing to release Berserker. He dies after losing his right leg and head to Drift.


 * Shatter (voiced by Angela Bassett) is a female Decepticon Triple Changer who transforms in 1971 Plymouth GTX. She will appear in "The Bumblebee Movie".


 * Dropkick (voiced by Justin Theroux) is a Decepticon Triple Changer who transforms into a AMC Javelin and a Bell AH-1 SuperCobra. He will appear in "The Bumblebee Movie".


 * Blitzwing (voiced by David Sobolov) is a Decepticon Triple Changer who transforms into a McDonnell Douglas F-4 Phantom II. He will appear in the Bumblebee movie.


 * Skywarp is a Decepticon Seeker who transforms into a Cybertronian Jet. He will appear in the Bumblebee movie.


 * Thundercracker is a Decepticon Seeker who transforms into a Cybertronian Jet. He will appear in the Bumblebee movie.


 * Dirge is a Decepticon Seeker who transforms into a Cybertronian Jet. He will appear in the Bumblebee movie.

Humans

 * William "Will Bill" Lennox (portrayed by Josh Duhamel) is an Army Rangers officer, a member of NEST and a former member of TRF aiding the Autobots who has a wife and a newborn daughter back home.


 * Mikaela Banes (portrayed by Megan Fox) is Sam's first love interest in the first two films.


 * Carly Spencer (portrayed by British model Rosie Huntington-Whiteley) is Sam's second girlfriend and later fiancee in the third film.


 * Robert Epps (portrayed by Tyrese Gibson) is a United States Air Force Combat Controller Technical Sergeant and a friend of Lennox.


 * Judith "Judy" Witwicky (portrayed by Julie White) is Sam's crazy mother and Ron's wife.


 * Ronald "Ron" Witwicky (portrayed by Kevin Dunn) is Sam's equally crazy father and Judy's husband.


 * John Keller (portrayed by Jon Voight) is the United States Secretary of Defense.


 * Maggie Madsen (portrayed by Rachael Taylor) assists the Department of Defense in decoding the virus left by Frenzy. She realizes that those hacking into the government's data files cannot be human, due to the ease with which they made the attack. The writers had initially envisioned Maggie as quirkier and more cyberpunk. The filmmakers opted for Taylor's natural Australian accent to give the film a global sensibility. She found many of her scenes difficult because of the high heels she wore.


 * Glen Whitmann (portrayed by Anthony Anderson) is a computer hacker and friend of Maggie.


 * Jorge "Fig" Figueroa (portrayed by Amaury Nolasco) is an ACWO operative. Fig is wounded by a rocket fired by Scorponok. In a deleted scene in the Blu-ray version of the film, "Fig" is seen dying after getting wounded by Scorponok, but his character was made to stay alive in the finished film and he was even offered to reprise his role in Revenge of the Fallen, which he had to refuse due to scheduling conflicts.


 * First Sergeant Patrick Donnelly (portrayed by Zack Ward) is a friend of Fig and Lennox. He is impaled and killed by Scorponok with his corpse being dragged under the sand.


 * Colonel Sharp (portrayed by Glenn Morshower) is a marine who was killed during Blackout's attack in the beginning of the first film. He is credited as "SOCCENT sergeant".


 * Bobby Bolivia (portrayed by Bernie Mac) is a used car dealer from whom Sam purchases Bumblebee.


 * Miles Lancaster (portrayed by John Robinson) is Sam's best friend.


 * Sarah Lennox (portrayed by Samantha Smith) is the wife of William and a mother of a newborn daughter, Annabelle Lennox.


 * Mr. Hosney (portrayed by Peter Jacobson) is the humorless high school teacher.


 * Trent DeMarco (portrayed by Travis Van Winkle) is Mikaela's mean football jock and former boyfriend before Sam came along. Van Winkle reprised the character in Friday the 13th (2009).


 * Leo Spitz (portrayed by Ramón Rodríguez) is Sam's whiny and cowardly college roommate who owns a website on conspiracy theories called www.TheRealEffingDeal.com. Rodríguez endured 100 mph winds created by electrical fans while filming in Egypt, which resulted in him dislocating his shoulder and having to spend 45 minutes having sand flushed from his eyes. At some point, the character was supposed to be called "Chuck" and Jonah Hill was considered for the role.


 * Theodore Galloway (portrayed by John Benjamin Hickey) is the American National Security Adviser who believes the Autobots' presence on Earth is the reason for the Decepticons still remaining on the planet. However, this later evolves into irrational prejudice and contempt towards the Autobots, invoking the ire of Lennox, Epps, Ratchet, and (to a lesser extent) Optimus Prime, with the latter even going so far as to threaten him. After Megatron's return and Optimus' death, Galloway orders a shutdown on the partnership with NEST and the Autobots and to have Optimus' corpse shipped to Diego Garcia, also telling Lennox and his men to stand down. However, during the flight there, Colonel William Lennox straps him into a parachute, before opening the docking board, sending Galloway flying out of the plane. He lands in an uncharted Egyptian desert, and angrily calls General Morshower to complain. Morshower promptly hangs up on him. It is unknown what happened to him after that, but it can be implied he got fired for his dirty actions.


 * Professor R. A. Colan (portrayed by Rainn Wilson) is Sam's college lecturer who initially disliked Sam because of his bizarre behavior which upstaged Colan during the first day in class, but later respects him after learning of Sam's involvement in saving the world once again.


 * Fassbinder (portrayed by Jonathan Trent) is one of Leo's friends.


 * Sharsky (portrayed by Walker Howard) is one of Leo's friends.


 * Colin "Cal" Banes (portrayed by Michael Papajohn) is the father of Mikaela.


 * Tova Simmons (portrayed by Annie Korzen) is the mother of Simmons who works at the meat store.


 * Yakov (portrayed by Sean T. Krishnan) is a worker at the meat store with Seymour and Tova.


 * Dylan Gould (portrayed by Patrick Dempsey) is a human collaborator and secret agent of the Decepticons. His father also first met with Soundwave and Laserbeak. Later in the Battle of Chicago, he is finally killed by Sam Witwicky.


 * Bruce Brazos (portrayed by John Malkovich) is Sam's employer of his job.


 * Charlotte Mearing (portrayed by Frances McDormand ) is the tough-as-nails, no-nonsense Director of National Intelligence official. She has a history with Agent Simmons.


 * Dutch (portrayed by Alan Tudyk) is Agent Simmons' assistant. The name "Dutch" is a reference to the thug in The Transformers, and the character Lugnutz's rifle. He was once supposedly a cut-throat assassin who was quick on the trigger, but has since put that aside to start a new, civilized life.


 * Jerry "Deep" Wang (portrayed by Ken Jeong) is a paranoid software programmer and conspiracy theorist who stalks Sam at work. Jerry then gives Sam information about the moon program, assassinations and the "Dark Side of the Moon". It turns out he is also in league with the Decepticons, but gets murdered by Laserbeak for giving Sam the information about the Moon's secrets.


 * Dimitiri (portrayed by Elya Baskin) is a former cosmonaut who was supposed to travel to the dark side of the Moon. He gives Sam, Simmons, and Dutch the information about the Moon, showing them pictures and revealing Pillars being stockpiled on the Moon.


 * Alexi Voskhod (portrayed by Ravil Isyanov) is a scientist who learns the secrets of the Moon and is killed by Laserbeak in the beginning.


 * Donnie (portrayed by Andy Daly) is a worker with Sam.


 * Cade Yeager (portrayed by Mark Wahlberg) is the second main human protagonist of his first two films, a single father and an inventor who builds robots for money for his daughter, Tessa, to keep her safe after he made a promise to his wife before she died. In the fifth film, Edmund revealed that Cade is the Last Knight when the Talisman chooses him.


 * Tessa Yeager (portrayed by Nicola Peltz) is Cade's daughter, and Shane's secret girlfriend. She made a voice cameo on a phone in the fifth film.


 * Shane Dyson (portrayed by Jack Reynor) is Tessa's secret boyfriend and an Irish race car driver.


 * Lucas Flannery (played by T. J. Miller) is Cade's best friend and a mechanic. He tried to escape with Cade, Tessa, Shane, and Optimus, but he was killed by Lockdown's grenade.


 * Izabella (portrayed by Isabela Moner) is a street-smart tomboy who grew up an orphan after she survived the battle of Chicago and becomes friends with Sqweeks and Canopy. Izabella became Cade's adoptive daughter.


 * Viviane Wembly (portrayed by Laura Haddock as an adult, Minti Gorne as a young girl) is a Professor of English Literature at the University of Oxford and the last descendant of Merlin. When she is kidnapped by a car, it speaks and is revealed to be Hot Rod, who scans a new alt. mode. She was trying to protect herself from Hot Rod, until she met with Sir Edmund, Cade, Bee and Cogman. She learns that her father had first met Hot Rod with a book of Merlin and the Staff. She is the one who claims the Staff of Merlin to save Earth and Cybertron from colliding with each other.


 * Jimmy (portrayed by Jerrod Carmichael) is one of Cade's friends and employee in The Last Knight.


 * Charlie Watson (portrayed by Hailee Steinfeld) is a teenage girl who will appear in Bumblebee.

Human organizations

 * Order of the Witwiccans is a group of the descendants of Merlin who know the presences and secret histories of Transformers on Earth that was founded in 484 AD. Most of its known figures that became members of this group include famous people throughout history. Their motto is "No sacrifice, No victory".
 * Sir Edmund Burton, 12th Earl of Folgan (portrayed by Anthony Hopkins) is a historian, a member of the Order of the Witwiccans, and an astronomer. He also knows Bumblebee when they first met when he was a little boy with short pants. Burton has a portrait of every known member of the Order of the Witwiccans in his castle that consist of historical figures. He and Simmons learn the secrets of Cybertron and Unicron. Burton is later killed by Megatron, when trying to stop him from rebuilding Cybertron with Quintessa. He dies in Cogman's arms.
 * Seymour Rutherford Simmons (portrayed by John Turturro) is a former arrogant and paranoid Sector 7 agent, the son of Tova Simmons, Sam's unlikely enemy-turned-ally in the first three films, a former member of NEST, and the last surviving member of the Order of the Witwiccans.
 * Captain Archibald Witwicky (portrayed by W. Morgan Sheppard) is the great-grandfather of Ron or Judy, the great-great-grandfather of Sam and the member of the Order of the Witwiccans. Archibald is a sea captain leading an exploration of the Arctic in 1897, when his dogs found something beneath the ice. They started digging and he discovered the frozen Megatron. He then accidentally activated Megatron's inertial navigation system which led to a sudden power surge, and died. Unbeknownst to him, the discharge etched a digital map to the AllSpark onto the lenses of his glasses. These were passed down over time and eventually given to his great-great-grandson Sam.
 * Samuel James "Sam" Witwicky (portrayed by Shia LaBeouf) is the first main human protagonist of the original trilogy who first aid the Autobots, the son of Ron and Judy, the great-great-grandson of Archibald and a member of the Order of the Witwiccans. He made a cameo as a photo in The Last Knight, possibly meaning that Sam was presumably killed.
 * Arthur (portrayed by Liam Garrigan) is the legendary British knight of England during The Dark Ages in The Last Knight.
 * Merlin (portrayed by Stanley Tucci) is Arthur's wizard who formerly claims his Staff, given by Stormreign to help Arthur. When extracting his DNA, it is revealed that he is Viviane's ancestor making her his last descendant to protect his Staff from Quintessa.
 * The Knights of the Round Table – The Knights of the Round Table are King Arthur's elite warriors.
 * Lancelot (portrayed by Martin McCreadie) – Member of the Knights of the Round Table.
 * Gawain (portrayed by Marcus Fraser) – Member of the Knights of the Round Table.
 * Tristan (portrayed by John Hollingworth) – Member of the Knights of the Round Table.
 * Percival (portrayed by Rob Witcomb) – Member of the Knights of the Round Table.
 * Moriaen – Member of the Knights of the Round Table.
 * Ludwig van Beethoven – A German composer and pianist.
 * Giotto di Bondone – An Italian painter and architect from Florence during the Middle Ages.
 * Catherine the Great – An empress from Russia from 1762 to 1796.
 * Winston Churchill – The Prime Minister of Great Britain.
 * Nicolaus Copernicus – A famed mathematician and astronomer who formulated a model of the universe that placed the Sun rather than the Earth at the center of the universe.
 * Charles Darwin – An English naturalist, geologist, and biologist.
 * Frederick Douglass – An African-American social reformer, abolitionist, orator, writer, and statesman.
 * Albert Einstein – A physicist who developed the theory of relativity.
 * Queen Elizabeth I – The Queen of England from 1558 until her death on March 24, 1603.
 * Galileo Galilei – An Italian polymath who is known for astronomical innovations.
 * Stephen Hawking – A paralyzed physicist, cosmologist, and author.
 * King Henry V – The King of England from 1413 until his death at the age of 36 in 1422.
 * Edmund Hillary – A New Zealand mountaineer, explorer, and philanthropist who became one of the first people to reach the top of Mount Everest.
 * Antoine Lavoisier – A French nobleman and chemist.
 * Abraham Lincoln – The 16th President of the United States.
 * Gustav Mahler – An Austro-Bohemian late-Romantic composer and one of the leading conductors of his generation.
 * Michelangelo – An Italian sculptor, painter, architect, and poet of the High Renaissance.
 * Wolfgang Amadeus Mozart – A prodigal Austrian composer and pianist.
 * Isaac Newton – An English mathematician, astronomer, theologian, author and physicist.
 * Theodore Roosevelt – The 26th President of the United States.
 * William Shakespeare – An English poet, playwright, and actor.
 * Nikola Tesla – A Serbian-American inventor, electrical engineer, mechanical engineer, physicist, and futurist.
 * Harriet Tubman – An African-American abolitionist and political activist.
 * Queen Victoria – The Queen of England from June 20, 1837 until her death January 2, 1901.
 * Leonardo da Vinci – A polymath, inventor, artist, sculptor, scientist, and writer of the Italian Renaissance.
 * George Washington – The 1st President of the United States.
 * Wright brothers – Two brothers who are the inventors of the airplane.


 * Sector 7 is a secret American government agency, which deals with extraterrestrial technology and threats in Transformers. Following the fight in Mission City, Sector 7 was shut down.
 * Tom Banachek (portrayed by Michael O'Neill) is the head of Sector 7's Advanced Research Division.
 * Agent Burns (portrayed by John Cena) is a Sector 7 agent who will appear in Bumblebee.
 * Agent Powell (portrayed by John Ortiz) is a Sector 7 agent who will appear in Bumblebee.


 * The Non-biological Extraterrestrial Species Treaty, or NEST for short, is a team of soldiers led by Lennox and Epps with help Sam Witwicky in Revenge of the Fallen and Dark of the Moon. They combined with the Human/Autobot alliance to fight against the Decepticons. It was disbanded after the Battle of Chicago. However, remnants later came together as the TRF.
 * General Morshower (portrayed by Glenn Morshower) is the leader of NEST and formerly TRF who communicates with the squad in the Pentagon.
 * Graham (portrayed by Matthew Marsden) is an agent of the fictional SASF, and a member of the British Army Special Air Service who joins NEST.
 * Burke (portrayed by Brian Shehan) is a member of Lennox's eight man team who survives Blackout's attack and later helps the Autobots at Mission City. He returns in Revenge of the Fallen as part of NEST.
 * Hardcore Eddie (portrayed by Lester Speight) is a former NEST soldier.
 * Stone (portrayed by Josh Kelly) is a former NEST member who went into retirement along with Epps in Dark of the Moon. Kelly also portrayed Stone as a Strike Force team member in Revenge of the Fallen.
 * Mongo (portrayed by Aaron Garrido) is a NEST member in Revenge of the Fallen who retires but later comes back to help in Dark of the Moon.
 * Hooch (porrayed by Mikal Vega) is a NEST member who retired but came back to help in Dark of the Moon for the battle of Chicago.
 * Marc L (portrayed by Kenny Sheard) is a NEST member who retired but came back to fight in the battle of Chicago in Dark of the Moon
 * Baby Face (portrayed by Markiss McFadden) is a young NEST soldier who is part of Lennox's team during the battle of Chicago.


 * Kinetic Solutions Incorporated, KSI for short, is the robotics company who works Cemetery Wind and builds the remote control Transformers that headquartered at Chicago, later Beijing, China. After the final battle of Hong Kong, KSI ceased production of its remote control Transformers.
 * Joshua Joyce (portrayed by Stanley Tucci) is the arrogant head of KSI who wants to build his own Transformers. However, he later comes to realize what he's done and that Megatron had been using his technology to improve himself and the other Decepticons. Following the deaths of Harold Attinger and Lockdown, Joshua begins to do reparations for Cade Yeager starting with paying for the rebuilding of his farm house that was destroyed by Cemetery Wind.
 * Darcy Tirrel (portrayed by Sophia Myles) is a geologist assistant and Joyce's ex-girlfriend. She discovered cyber-formed dinosaurs in the Arctic, leading her to suspect that the Seed is more dangerous than Joshua is willing to admit and is ultimately right.
 * Su Yueming (苏月明 Sū Yuèmíng) (portrayed by Li Bingbing) is the owner of the Chinese factory in Beijing, China, used by KSI to build more artificial Transformers.
 * Gill Wembley (portrayed by James Bachman) is a KSI selfish scientist who used to work for Joshua to built remote-controlled Transformers.


 * Cemetery Wind is a secret black-ops unit of the Central Intelligence Agency and works with KSI. They were asked to hunt down the Decepticons only, but without the President's and their own agency's knowledge, Cemetery Wind have secretly gone rogue by eliminating the Autobots and due to Attinger's belief that all Transformers were menaces to humanity, no matter their faction. After the final battle of Hong Kong and the deaths of Attinger and Savoy, Cemetery Wind has been shut down but gets replaced with the TRF.
 * Harold Attinger (portrayed by Kelsey Grammer) is a corrupt government agent who is the nefarious founder of the CIA division Cemetery Wind. He holds extreme, possibly racial resentment of the transformers species as a whole (with the possible exception of Lockdown, who ironically has a similar resentment to humans). Later in the battle of Hong Kong, he is finally killed after being shot in the chest by Optimus Prime, saving Cade's life, before Optimus kills Lockdown.
 * James Savoy (portrayed by Titus Welliver) is the field leader of the CIA division Cemetery Wind and the right-hand man of Harold Attinger. He lost his sister in the battle of Chicago, which might be one of the reasons why he supported the idea of exterminating the transformers species and not care which side they're on. He later got killed by Cade Yeager who knocked him off a building during their fight.


 * Transformers Reaction Force (TRF) is a new military organization that seeks to eradicate destroy of all Transformers, both Autobots and Decepticons, hiding on Earth. TRF was is created from the remnants of CIA unit, Cemetery Wind as well as from the remnants of military unit, NEST, they also are willing to kill any allies and sympathizers among humans that the Cybertronians might have. They are led by Santos, a former Delta Force Operator. However, events cause TRF to create an alliance to the Autobots and Cade Yeager to save the Earth from Quintessa. At the end of the movie, the TRF was most likely disbanded.
 * Santos (portrayed by Santiago Cabrera) is the leader of the TRF (Transformers Reaction Force) and a former Delta Force Operator who was born in São Paulo, Brazil and grew up in Phoenix, Arizona. He seeks to destroy all remaining Cybertronians left on Earth and doesn't trust Lennox, but the Autobots are being protected by Cade at the junkyard. However, at the climax, he aids the Autobots to retrieve the Staff from destroying Earth and Cybertron from the Decepticons.

Real life characters
Several real world actors play themselves in the films. Several of them are credited and/or uncredited at the end of each film.


 * John F. Kennedy makes a cameo in the beginning of Dark of the Moon. On November 22, 1963, he was assassinated by Lee Harvey Oswald at Dallas, Texas at the age of 46.
 * Walter Cronkite plays himself in the beginning of Dark of the Moon. On July 17, 2009 after the release of Revenge of the Fallen, he died at his home in New York City, New York, at the age of 92.
 * Barack Obama made a cameo as himself in the beginning of Dark of the Moon, who gives a medal to Sam.
 * Buzz Aldrin plays himself, who greets Optimus Prime in Dark of the Moon, with Buzz and Optimus both affirming that it is an honor to meet a fellow space traveler. Also, Cory Tucker plays young Buzz Aldrin in the beginning of the film in 1969.
 * Bill O'Reilly makes a cameo as himself interviewing Agent Simmons on his show The O'Reilly Factor in Dark of the Moon.
 * General Motors Vice President of Design Edward T. Welburn makes a cameo appearance as a KSI executive himself in Age of Extinction.
 * Director Michael Bay makes a cameo appearance in Transformers where he was flicked by Megatron. He made another cameo in Revenge of the Fallen aboard a C-17 transport where he and his crew were seen next to Optimus Prime in truck mode. He made a third cameo in Age of Extinction as the driver of the truck where Optimus Prime and Bumblebee destroy during their fight against Galvatron.
 * Han Geng makes a cameo as himself singing and playing the guitar in a parked car before being magnetized by Lockdown's ship in Age of Extinction.

Minor humans
The minor humans have small roles in the films. They appeared in one film each and are not seen again for the rest of the film.


 * Transformers
 * Johnny Sanchez as Clown.
 * Carlos Moreno, Jr. as Manny.
 * Ashkan Kashanchi as Mahfouz, a young Qatar boy.
 * Rizwan Manji as Akram, Mahfouz's father.
 * Ravi Patel as a Telephone Operator.
 * Brian Stepanek as a Sector 7 agent and driver of Simmons.
 * J. P. Manoux as a Witness.
 * Andrew Caldwell as a Cafe Kid.


 * Transformers: Revenge of the Fallen
 * Deep Roy as an Egyptian Guard.
 * Iqbal Theba as the UN Secretary-General.
 * John Nielsen as USS Roosevelt Captain/Wilder.


 * Transformers: Dark of the Moon
 * Drew Pillsbury as Robert McNamara.
 * Don Jeanes as young Neil Armstrong, a NASA astronaut on the Apollo 11 mission.
 * Anthony Azizi as Sulimani.
 * Mindy Sterling as Female Insurance Agent/Martha.


 * Transformers: Age of Extinction
 * Richard Riehle as the Theater Landlord.
 * Patrick Bristow as the Theater Landlord's grandson.
 * Cleo King as Realtor/Mary Jo McGatlin.
 * Thomas Lennon as Chief of Staff.
 * Charles Parnell as a CIA Director.
 * Erika Fong as a CIA Analyst
 * Blair Adam Baillio as Robot Thief/Timothy.
 * Melanie Specht, Victoria Summer, Abigail Klein, and Greg Anderson as Joshua Joyce's assistants.


 * Transformers: The Last Knight
 * Mitch Pileggi as a TRF Group leader.
 * Tony Hale as a JPL Engineer.
 * Gil Birmingham as Chief Sherman, a sheriff on an Indian reservation that helps to keep Cade Yeager's secret.

Sam has dogs, such as Mojo (Chester the Chihuahua), Frankie (Paris) and Bonecrusher (himself), that was owned by Michael Bay. Miles also has Mason the Mastiff dog, that was also owned by Bay, when he died in 2007.

Jorge Lendeborg Jr., Jason Drucker, Pamela Adlon, Abby Quinn, Rachel Crow, Ricardo Hoyos, Gracie Dzienny, Kenneth Choi, and Stephen Schneider will play unnamed characters in Bumblebee.

Other Cybertronians

 * The AllSpark Mutations are Earth machinery that were brought to life as feral and dangerous Cybertronians by Sam Witwicky with the AllSpark in the 2007 film and Revenge of the Fallen.
 * The Nokia-bot is an AllSpark Mutation transformer who was a Nokia N93i cell phone formerly owned by Glen Whitmann and transformed into a Transformer by the power of the AllSpark. It is a rather violent and hysterical creature, armed with several weapons. When it tried to break out of the case with its bullets and missiles, it was killed by an energy pulse by Simmons. A Nokia-bot also appeared in the Verizon FiOS Commercial where Michael Bay bashed aside the Nokia-bot and it exploded that his explosions are awesome.
 * A Steering Wheel bot is the AllSpark Mutation transformer who appeared as a steering wheel transformed into a creepy wheel with spider-like limbs. It was seen hugging a woman's face while screaming.
 * An Xbox 360 robot is an AllSpark Mutation transformer who is a type of an Xbox 360 console. It was first seen inside the box while a man drops it and runs away. In the IDW comics, it was destroyed by Ironhide.
 * Dispensor is an AllSpark Mutation transformer who transforms into a Mountain Dew vending machine, and appeared to have four arms (with three original arms and a cannon on the right arm). In Age of Extinction, Dispensor appeared in the toyline, a remodel and green repaint of Payload with a new head model and a cannon. In the IDW comics, he was destroyed by Ratchet.
 * The Appliancebots are a group of common household appliances that came to life to kill Sam, and later killed by Bumblebee. Those include Dickbot the blender guy, Ejector (Toaster), a Dyson Vacuum cleaner, a Microwave oven bot, a Waffle iron, a Cappuccino bot, a Garbage disposal bot, a Hand mixer, a Stand mixer and a Cisco Systems Aironet.


 * The Seven Primes (three of them are voiced by Michael York, Kevin Michael Richardson, and Robin Atkin Downes) are the first Cybertronians who came into distant galaxies looking for planets where they could build Sun Harvesters. It was during the Dynasty's rule that Sun Harvesters were not to be used in solar systems containing life. In 17,000 B.C.E., one of them defied his brothers' rule about destroying planets with life by powering up the Sun Harvester, an act that ignited a war and earned him the name The Fallen. To stop the Sun's destruction the remaining six stole and hid the Matrix of Leadership, sacrificing themselves to make a tomb of their own bodies, sealing the Matrix away. When Sam dies, he has a vision of the Dynasty and they tell him he has earned his destiny. The Dynasty then resurrects Sam, who uses the Matrix of Leadership to bring Optimus back to life and kills the Fallen. Their bodies resemble their brother the Fallen.


 * The Creators are a mysterious extraterrestrial race who are the creators of all Cybertronians, based on the Quintessons from the Generation 1 lore. In the beginning of Age of Extinction, 65 million B.C.E., they invade the organic planets, including Earth, using the Seeds, cyberforming the planet, and ending the age of the Dinosaurs and causing the KT extinction event. Later, they harvest and use the resultant metal and the AllSpark to build the Cybertronians—Autobots and Decepticons. Million of years later, they send their bounty hunter Lockdown to Earth—to bring Optimus Prime alive, wanting their "chessboard cleaned" and wanting him to rebuild Cybertron, and kill the remaining Autobots and Decepticons. They appear to be hostile and consider the intermingling of species to upset the cosmic balance. At the end after Lockdown was killed, Optimus flies into space from Earth that he is coming for them with the Seed. They don't appear in body, but a pink, organic-looking hand is briefly seen inside of one of their ships.


 * Lockdown (voiced by Mark Ryan in the film, Gregg Berger in Rise of the Dark Spark) is a ruthless, cold hearted and barbaric Cybertronian bounty hunter who transforms into a grey 2013 Lamborghini Aventador LP 700-4 Coupe and speaks with a Cockney accent. His robot mode slightly resembles Optimus Primal's appearance in Beast Machines, but also features a scar on his left face and he is capable of turning his helmet into a gun, and uses his hook (from the Revenge of the Fallen deluxe version), a sword and a booster shot. In the film, Lockdown is working for Quintessa to bring Optimus Prime to rebuild Cybertron. He made a deal with Attinger (though he does have a slur towards humans, much like Attinger does to transformers, yet neither seem to hate each other specifically) to kill the remaining Autobots including Ratchet, Leadfoot, (possibly Sideswipe and Mirage) and Deceptions on Earth while offering the Seed in exchange for aid in hunting Optimus. At some point in the past, Lockdown also captures the Legendary "Dinobot" Knights and took over the Knight Ship, but they are later freed by Optimus in order to destroy Galvatron's army. Later in a duel at Hong Kong, Lockdown is finally killed by Optimus Prime, who vertically bisects him, avenging the deaths of Ratchet, Leadfoot, and Lucas. Afterward, his body was destroyed by his own grenade, when Optimus destroys the rest of the KSI Drones.
 * The Mercenaries are a group of techno-organic humanoids of Lockdown. They use the Drone balls to roll and see anything aboard the ship, appeared to have red or green lights on their faces and reuse the Decepticon weapons. Several of them are killed by Cade, Shane, and Crosshairs, while the surviving ones remained inside Lockdown's ship, as the two Drone balls are also killed by Cade on the Knight ship. They also used the Cybertronian starfighters, which first appeared in Dark of the Moon for Decepticons to first use in the battle of Chicago. It is revealed in The Last Knight that they were defeated by Daytrader, taking the Knight Ship for the Autobots.
 * The Steeljaws are the techno-organic wolf-like creatures and the minions of Lockdown. They are colored black and blue in the toyline. During the Autobots' aid in the Knight Ship while hanging on the cables, they are killed by Cade Yeager and Bumblebee. They were originally called Wolves (appeared in Trading cards), but later these names were changed to Steeljaws. The Steeljaws do not transform in the film, though they do transform in the Age of Extinction toyline. It is revealed in The Last Knight that they were defeated by Daytrader, taking the Knight Ship for the Autobots.
 * The Stupid Drones are a group of wheeled-bots of Lockdown who have cartoon-like eyes and have claws. It is revealed in The Last Knight that they were defeated by Daytrader, taking the Knight Ship for the Autobots.


 * Quintessa (voiced and portrayed by Gemma Chan) is a mysterious Cybertronian sorceress who claims to be the "Prime of Life" and the creator of the race of Transformers who attempts to destroy Unicron. She has a Staff with the power of Cybertron, but her Knights betrayed her and stole her Staff and hidden on Earth. After Cybertron was destroyed in Dark of the Moon, she plans to destroy Earth to rebuild the planet, with Optimus Prime (who was coming for questions on why his Creators want him back), who formerly becomes "Nemesis Prime", and Megatron. After failing her plan to retrieve her staff, she disguised herself as a human offers the Humans on how to kill Unicron. She appears to have the ability to create balls of blue electricity and throw them as projectiles.
 * The Infernocons are a group of demon-like Cybertronians and the guardians of Quintessa who combine into Infernocus. There are six Infernocons to form Infernocus, but they are soon killed by Optimus Prime at the climax by having their heads cut off in one motion.
 * Skulk – An Infernocon who forms the torso of Infernocus and has no bestial form.
 * Thrash – An Infernocon who transforms into a two-headed land dragon. He forms the left arm of Infernocus. Thrash is a redeco of Twinstrike from Transformers: Prime.
 * Rupture – An Infernocon who transforms into a wyvern. He forms the right arm of Infernocus. Rupture is a redeco of Divebomb from Transformers: Prime.
 * Gorge – An Infernocon who transforms into a bipedal land dragon. He forms the left leg of Infernocus. Gorge is a redeco of Rot Gut from Transformers: Prime.
 * Glug – An Infernocon who transforms into a lizard-like land dragon. He forms the right leg of Infernocus. Glug is a redeco of Rippersnapper from Transformers: Prime.


 * The Guardian Knights (also known as the Knights of Iacon) are a group of the first Cybertronians created by Quintessa who betrayed her and hide an ancient Cybertronian staff on Earth within their ship and gave it to Merlin. There are 12 of them who formed into Dragonstorm.
 * Dragonstorm is the combined form of the 12 Knights who appears as a mechanical three-headed dragon.
 * Stormreign is a "red Knight" and the leader of the Knights of Iacon who gave Merlin the Staff and combine with his fellow Knights into Dragonstorm. In the toyline, only Stormreign and Dragonicus can combine to form Dragonstorm where he forms the tail and central head.
 * Dragonicus is a Guardian Knight who combines with his fellow Knights into Dragonstorm. In the toyline, only Dragonicus and Stormreign can combine to form Dragonstorm where he forms most of the body.
 * Steelbane is a Guardian Knight who combines with his fellow Knights into Dragonstorm. He and Skullitron do not transform in the film, but only in the toyline as a mechanical wyvern.
 * A Talisman Knight is a Guardian Knight who only appeared in The Last Knight. Under unknown circumstances, he was present during the Battle of Chicago, where his ship crashed and left him dormant. When a group of kids enter a war torn area of Chicago to see some "dead robots", they are frightened by a dying Knight awakening while looking in his crashed ship. Cade discovers a Knight, who refuses treatment and gives Cade the talisman before dying. The Talisman Knight's character model is a recycled version of Dragonicus.
 * Skullitron is a Guardian Knight who only appeared in The Last Knight. When Cade and Viviane arrive to find the staff, the TRF arrive after Cade accidentally awakens Skullitron. Skullitron attacks everyone present to protect the staff, but is shot multiple times by the TRF and falls into a large crevice to his death. He and Steelbane do not transform in the film, but only in the toyline as a mechanical wyvern where he is a redeco of Steelbane with a new head.


 * Unicron is a planet that formed Earth, the Chaos Bringer and Cybertron's ancient enemy who finally appeared in The Last Knight. His six horns are around the planet when Sir Edmund Burton searched a book with pictures of Unicron and Cybertron itself. Later, Quintessa plans to destroy Unicron, so that Cybertron will live. Two worlds begin to collide, but two worlds are saved by the Autobots and the Knights who retrieved the Staff and vanquished Quintessa. However, unaware to them after they leave, Quintessa survived and disguised herself as a Human and continues her plans to destroy him.


 * A Vatti Transformer (voiced by Reno Wilson) is a Cybertronian who only appeared when Daytrader was collecting the remain pieces. It transformed into one with two parts until it was killed by Bumblebee.


 * The Watch that Killed Hitler is a small yellow Cybertronian watch that is kept in a glass case by Sir Edmund Burton who appeared in The Last Knight. It keeps various deadly weapons hidden inside its inner workings that it deploys when a target is close enough. As the name suggests, this watch killed Hitler. Sir Edmund Burton used this watch to discourage British guards from stopping his conversation with the Prime Minister.

Unused Transformers
Several Transformers were set to appear in the films, but cut or removed in the final cut of the films and their roles were taken to the Transformers that appeared. They only appeared in the toylines—including Transformers, Transformers: Revenge of the Fallen, Transformers: Dark of the Moon and Transformers: Age of Extinction.


 * Wreckage is a Decepticon who was originally supposed to appear in the first film, transforming into a M1126 Stryker ICV as his alt mode, which had been designed, but eventually didn't get used in the film. Wreckage appears in the 2007 film toyline and Revenge of the Fallen prequel comics, transforming into an ice-based camouflaged Stryker and later a natural camouflaged version. It is revealed in the comics that Wreckage is the reason humans know so much about the Transformers. He is killed by Starscream for "treason."


 * Tidal Wave is a Decepticon who was originally supposed to appear in the first film. Michael Bay also considered the character, capable of turning into an aircraft carrier, but was dropped for cost reasons. The character was included in one of Orci and Kurtzman's drafts of the script, and concept art was even created for it.


 * Silverbolt is an airborne Autobot who was originally supposed to appear in Dark of the Moon. A January 2010 interview with late actor James Avery claimed that he would be providing the voice of Silverbolt in the third film, but no such character appeared in the finished movie, and Avery died on December 31, 2013, a day before 2014, age 68 from complications following open heart surgery. In spite of his removal, he does appear in the prequel video game of the same name as an Aerialbot who transforms into a General Dynamics F-16 Fighting Falcon, alongside Breakaway and Air Raid, where they were killed by Starscream.


 * Slash is a Dinobot stealth fighter who transforms into a mechanical spine-clawed Velociraptor. He was seen in promotional images for Age of Extinction and he was also made into a toy, but wasn't seen in the film's trailers and spots. He is colored light green and light blue in the toy line. In the toy line, Hound rides Slash and in the concept art, a large number of Slashes charging into Hong Kong alongside Scorn. Slash's toy design is based on these pieces of concept artwork. In the Contrust-Bots line, his head is the same for Dinobot's from Beast Wars. In the concept art, he was known as "Velociraptor" and "Raptor".


 * Slog is a large Dinobot who transforms into a mechanical spiked Apatosaurus. He was seen in promotional images for Age of Extinction and he was also made into a toy, but wasn't seen in the film's trailers and spots. He is colored red and black in the toy line and he looks similar to Sludge.


 * Snarl is a Dinobot who transforms into a mechanical Stegosaurus. He was seen in promotional images for Age of Extinction and he was also made into a toy, but wasn't seen in the film's trailers and spots. He is colored green and yellow in the toy line.


 * Depthcharge is an autobot aqua-tactician and spy who transforms into a Littoral Combat Ship (albeit with missile-racks in place of the helipad). He was meant to appear in Revenge of the Fallen.


 * Evac is an autobot who specializes in rescue-operations. He transforms into a Sikorsky MH-53 like Blackout and Grindor (but differs by having a rescue-themed coloration and an inflatable-raft that can turn into a gun), and later a Eurocopter HH-65 Dolphin. He was supposed to appear in the first film.


 * Springer is an Autobot who specializes in brute-force and is often quite proud of it, though others tend to treat him as cruel. He turns into a greenish V-22 Osprey. He was going to appear in Revenge of the Fallen.


 * Prowl was one of the first candidates for the first-film, but got replaced by Barricade. Likewise, he also turns into a police car.


 * Breakaway was an early candidate for Revenge of the Fallen, but got restricted to the associating video-game, sequel-comics (where he's killed by Soundwave) and Dark of the Moon video game where he was voiced by Andrew Kishino in the Revenge of the Fallen video game and by Christian Lanz in the Dark of the Moon'' video game. He transforms into a Lockheed Martin F-35 Lightning II and was also going to be named Firestorm.