Characters / Transformers: Robots in Disguise

This is the character page for the characters who appear in the anime Transformers: Robots in Disguise.

For the characters from the 2015 cartoon of the same name, see Transformers: Robots in Disguise.

For the characters from the IDW comic with a similar name, see The Transformers: Robots in Disguise.

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Optimus Prime

Voiced by: Neil Kaplan (English), Satoshi Hashimoto (Japanese)

The leader of the Autobots.
  • Badass Baritone: Neil Kaplan makes a very good Peter Cullen impression.
  • Beware the Nice Ones: It's amazing how someone who prefers to solve things through diplomacy and understanding can be so dangerous in combat.
  • Big Good: Leader of the Autobots and all that.
  • The Captain: As usual, he's the one who leads the Autobots and tells them what to do.
  • Catch Phrase: Like any incarnation of Optimus Prime, "Autobots, transform and roll out!".
  • Dub Name Change: He is called Fire Convoy in the Japanese version.
  • Gentle Giant: He's pretty tall like most Transformers and also very well-intentioned.
  • The Hero: The main character, leader of the Autobots and the one with the most serious dedication at stopping Megatron.
  • My Greatest Failure: He feels terrible about not being able to save the Decepticons from Megatron's Brain Washing,
  • Nice Guy: He's very nice to Koji.
  • One-Man Army: One of the few Autobots who can fight Megatron without combining with anyone else.
  • Papa Wolf: Don't mess with Koji and the Autobots if you know what's good for you.
  • Parental Substitute: To Koji, while his dad was the prisoner of the Predacons.
  • Super Mode: Battle Mode, by combining with his trailer. Actually quite smart about it, as he will often use it immediately, rather than as a last-ditch.
    • Curiously, some episodes showed him in Battle Mode with no reason to be.
  • Wide-Eyed Idealist: Whole-heartedly believes the Decepticons have it within them to change.
  • Worthy Opponent: Scourge and Optimus respect each other as mighty adversaries.

Ultra Magnus

Voiced by: Kim Strauss (English), Takashi Matsuyama (Japanese)

One of the Autobots' greatest warriors. Although Ultra Magnus would remain a free agent for some time, he would still come to aid the Autobots whenever he felt they required assistance.
  • Big Badass Rig: His alt mode is a huge truck.
  • Blood Knight: Rare for an Autobot. Most of the time, all he cares about is fighting.
  • Comically Serious: Magnus is essentially the ultimate old-fashioned Straight Man, especially when paired with someone like Side Burn or Sky-Byte.
  • Defrosting Ice King: It takes a lot of time and patience.
  • Dub Name Change: He is called God Magnus in the Japanese version.
  • I Was Just Passing Through: In his earlier appearances, he only helps the Autobots fight the Predacons because the Predacons get in the way of his plans to get the Energon Matrix.
  • Jerk with a Heart of Gold: He eventually becomes nicer and a full-time ally to the Autobots.
  • Jerk with a Heart of Jerk: In his earlier appearances, he always has a selfish ulterior motive to helping Optimus Prime and the other Autobots, such as dealing with the Predaocns and Decepticons solely because he wants to fight Optimus himself.
  • Proud Warrior Race Guy: He really embraces fighting and being aggressive.
  • The Rival: To Optimus. The feeling is not mutual.
  • Robo Family: Optimus Prime's brother.
  • Sibling Rivalry: He and Optimus are brothers in this continuity and they initially don't get along.


Voiced by: Sandy Fox (English), Chieko Higuchi (Japanese)

The Tactical Artificial Intelligence, sentient computer A.I. of the Autobot base. Responsible sending out certain bots for perticular missions.
  • Benevolent A.I.: She's friendly enough and only loses her temper when other Autobots are acting out.
  • Dub Name Change: The Japanese version calls her Ai.
  • Mission Control: She mainly stays at Autobot HQ to dispatch the Autobots and inform them of their missions.
  • Pink Means Feminine: She wears pink clothes.
  • Projected Man: Well, projected girl. She's basically a hologram.
  • The Smurfette Principle: Even though she's not technically a female, or an Autobot. She's the only female bot/machine regular cast member.
  • Toyless Toyline Character: Except in Japan, but that "toy"... is just plain creepy because it's a figurine of her bathing with only her hat on.
  • Suspiciously Similar Substitute: To Teletraan I, both being an artificial intelligence aiding the Autobots. Somewhat justified in that she is canonically a daughter programme of theirs.


Voiced by: Walter Lang (English), Masami Iwasaki (Japanese)

An Autobot tow truck who is really strict about the "no parking" rules.


Voiced by: Michael Lindsay (English), Jin Nishimura (Japanese)

A competitive Autobot racing car.

Fortress Maximus

Voiced by: Steve Blum (English), Masayuki Kiyama (Japanese)

A colossal Autobot guardian hidden on Earth. Strong and durable, Fortress Maximus is an unstoppable force for good.
  • Dub Name Change: In the Japanese version, he's known as Brave Maximus.
  • Humongous Mecha: Biggest bot in the series.
  • Last of His Kind: Only one of his kind really, since there are no other Headmasters in the series and it isn't stated whether or not there have been others.
  • Losing Your Head: The only Headmaster of this series.
  • More Dakka: The amount of firepower Maximus possesses, is considerable.
  • Terse Talker: Says very little and always gets to the point.

    Autobot Brothers 

Side Burn

Voiced by: Wally Wingert (English), Punch UFO (Japanese)

One of the smaller Autobots who frequently chases after cute little sports cars.
  • Abhorrent Admirer: Towards the human Recurring Extra Kelly. Played with in that he's actually attracted to her red car due to mistaking it to be sentient.
  • Bash Brothers: What it means to be an Autobot Brother.
  • Badass Robot Family: Along with his brothers Prowl and X-Brawn.
  • Dub Name Change: His Japanese name is Speed Breaker.
  • Freudian Trio: The impulsive Side Burn is the Id.
  • Fun Personified: A likable young fella who just happens to be a Stalker with a Crush for anyone driving a cute red sports car. (Or rather, cute red sports cars themselves.)
  • Friend to All Children: Always the guy that lets Koji talk him into taking him along.
  • The Heart: His main responsibility is to keep his older brothers in line.
  • Kid-Appeal Character: He's said to be the youngest of the three brothers and is often very impulsive.
  • Lovable Sex Maniac: He has a thing for red cars and thinks that every single one he encounters is a gorgeous woman.
  • Morality Chain: All the Autobot Brothers are this for Ultra Magnus, though Side Burn warms up to him sooner than the others.
  • Nice Guy: For all his faults, he's a pretty decent person.
  • Robot Kid: Teenager at least. He's still the youngest of the Autobot Brothers.
  • Sibling Team: They're not called the Autobot Brothers for nothing you know.
  • Super Speed: He's described as the fastest of the brothers.


Function: Cop

Voiced by: Wankus (English), Takayuki Kondō (Japanese)

An Autobot officer, who always goes "by the book".


Function: Demolitions

Voiced by: Bob Joles (English), Masahiro Shibahara (Japanese)

The eldest of the Autobot Brothers, X-Brawn's rugged outdoorsman type, who loves driving off-road.

    Team Bullet Train 

Combined Form: Rail Racer

Railspike, Midnight Express, Rapid Run

Voiced by: Mike Reynolds (Railspike, English), David Lodge (Midnight Express and Rail Racer, English), Keith Diamond (Rapid Run, English), Shōji Izumi (J-Five and JRX, Japanese), Naomi Matamura (J-Four, Japanese), Eiji Takemoto (J-Seven, Japanese),

A combiner team made up trains.


Hot Shot

Voiced by: Michael McConnohie (English), Eiji Takemoto (Japanese)


Voiced by: Dan Woren (English), Junichi Miura (Japanese)


Voiced by: Michael McConnohie (English), Eisuke Yoda (Japanese)


Voiced by: Wally Wingert (English), Ryō Naitō (Japanese)


Voiced by: Steve Kramer (English), Kizatomi Nimura (Japanese)


Voiced by: Steve Blum (English), Riki Kitazawa (Japanese)

    Build Team 

Combined Form: Landfill

Function: Construction, Leader: Wedge, Members: Heavy Load, Grimlock, Hightower

Voiced by: Michael Reisz (Wedge and Landfill, English), Daran Norris (Heavy Load, English), Tom Wyner (Grimlock, English), Joe Ochman (Hightower, English), Yukiko Tamaki (Build Boy and Build King, Japanese), Yoshikazu Nagano ((Build Typhoon, Japanese), Hiroki Takahashi (Build Hurricane, Japanese), Masami Iwasaki (Build Cyclone, Japanese)

A combiner team made up construction vehicles who to act as the space bridge repair crew.
  • Blood Knight: Wedge is sometimes a little too eager to prove himself as a warrior.
  • Combining Mecha: Together they form Landfill.
  • Dub Name Change: In the Japanese version, their group name is Buildmaster, Wedge is called Build Boy, Hightower is called Build Cyclone, Heavy Load is called Build Typhoon, Grimlock is known as Build Hurricane, and their combined form is called Build King.
  • In-Name-Only: The original Grimlock was one of the Dinobots and had a T rex alt mode. This series' Grimlock is colored green and turns into a construction vehicle.
  • Kid Hero: Wedge is the youngest of the group and is implied to be even younger than Side Burn.
  • Nice Guy: Grimlock, he's certainly a far cry form that other Grimlock for being much more cooperative and nowhere near as egotistical.
  • This Is a Drill: Hightower has drills as weapons.



Voiced by: Daniel Riordian (English), Yōichi Kobiyama (Japanese)

The leader of the Predacons, and later the Decepticons and one of the most powerful Transformers in existence.
  • A Father to His Men: Believe it or not, albeit a gruff one. He will praise his warriors when they've done a good job.
    • Bad Boss: Where as Megatron genuinely respected his warriors, Galvatron had a tendency to suddenly try and kill his troops.
  • Ax-Crazy: The guy is soooo not mentally stable.
  • BFG: He's got quite a few in his collection.
  • Big Bad: He serves as the series' main antagonist.
  • Dragon-in-Chief: To the unseen Predacon Council, who are only mentioned in the English dub.
  • Dub Name Change: In the Japanese version, his name is Gigatron and his suped-up form is called Devil Gigatron rather than Galvatron.
  • Evil Laugh: The sheer creepiness his laugh is really noticeable when he's on a roll.
  • Evil Overlord: His goal is to conquer the entire universe.
  • Large Ham: His dialogue is often loud and bombastic.
  • Light Is Not Good: As Galvatron, he becomes mostly white.
  • One-Man Army: Frequently portrayed as an unstoppable force on the battlefield.
  • Took a Level in Jerkass: As Galvatron, Scourge and the Decepticons were toast.
  • Purple Is Powerful: Megatron's color scheme has a lot of purple in it.
  • That Man Is Dead: Boasted that he as Galvatron was a distinct entity from Megatron, which is rather silly considering the only apparent physical change was his paint job. However, his personality did get some severe adjustment.


Predacons: Sky-Byte, Slapper, Gas Skunk, Dark Scream

Voiced by: Peter Spellos (Sky-Bite, English), Peter Lurie (Slapper, English), Jerry DeCapua (Gas Skunk, English), Steve Blum (Dark Scream, English), Konta (Sky-Bite, Japanese), Ryō Naitō (Goosher, Japanese), Norio Imamura (Gas Skunk, Japanese), Hiroki Takahashi (Gildor, Japanese)

A quartet of Predacons who are powerful (though very stupid), all possessing savage(?) beast modes.
  • The Chew Toy: Mostly Sky-Byte suffers a lot of misfortunes.. Poor, poor Sky-Byte...
  • Crouching Moron, Hidden Badass: Sky-Byte, he's actually a pretty good fighter when he puts an effort into it. It's just that he has the worst/dumbest allies ever!
  • Dub Name Change: Their group is called the Destrongers in the original Japanese version. Individually, Sky-Byte is referred to as Gel Shark, Slapper is known as Goosher, and Dark Scream's name is Gildor (Gas Skunk is still Gas Skunk).
  • Dumb Muscle: All of them qualify to one degree or another due to being completely incompetent in spite of their great strength.
  • Informed Ability: They're (supposedly) a quartet of four vicious, robots with savage animal modes who have destroyed many planets. Their incompetence suggests otherwise.
  • Laughably Evil: Being completely inept, their screw-ups often make for very hilarious moments.
  • The Strategist: Sky-Byte at least tries to form a plan, but it's always screwed up by either bad luck or the incompetence of Slapper, Gas Skunk, and Dark Scream.
  • Undying Loyalty: Sky-Byte's loyalty to Megatron is unquestionable.
  • Warrior Poet: Sky-Byte, or he'd like to think he is anyway.



Voiced by: Barry Stigler (English), Taitem Kusunoki (Japanese)

Scourge is arguably Megatron's second in command, leading the Decepticon forces
  • Arch-Nemesis: To Optimus Prime.
  • Big Bad Wannabe: He believes himself to be stronger and more competent than Megatron, but his attempts to usurp his position as leader of the Predacons never work out.
  • Big Badass Rig: His alt mode is a huge truck.
  • Blood Knight: He really loves fighting.
  • Chronic Backstabbing Disorder: At one point pretends to reform only to deceive the Autobots.
  • Dub Name Change: His Japanese name is Black Convoy.
  • Evil Counterpart: Serves as one to Optimus Prime, partly because Optimus was scanned at the same time his alt mode was scanned.
  • Evil Sounds Deep: He speaks in a very deep voice.
  • Expy: He is somewhat based on Starscream due to being a complete sycophant to Megatron while secretly planning to overthrow him as leader.
  • Hidden Agenda Villain: He does a good job at hiding his plan of becoming the new leader.
  • Hoist by His Own Petard: Once he thought he'd managed to oust Megatron from command, his arrogance and lack of control over Fortress Maximus brought him back down. Megatron then wiped away his memories, and he never tried again.
  • Smug Snake: Scourge believes himself to be deadlier, and a more capable warrior than the rest of the Decepticons and Predacons. He has frequently been portrayed as more than a match for most of the Autobots. Unsurprisingly, he may actually be correct in his assumptions.
  • The Starscream: At one point, he attempts to destroy Megatron and usurp his position as Predacon leader using Fortress Maximus.


Combined form: Ruination

Mega-Octane, Ro-Tor, Armorhide, Rollbar, Movor

Voiced by: Bob Papenbrook (Mega-Octane and Ruination, English), Neil Kaplan (Ro-Tor, English), Richard Epcar (Armorhide, English), Michael Lindsay (Rollbar, English), Robert Acelrod (Movor, English), Holly Kaneko (Dolrailer and Baldigus, Japanese), Masao Harada (Hepter, Japanese), Takayuki Kondō (Dangar, Japanese), Riki Kitazawa (Greejeebar, Japanese), Hidenori Konda (Shuttler, Japanese)

A group of Autobots turned Decepticon thanks to Megatron's meddling. They transform into combat vehicles and serve as Megatron's top generals.
  • Combining Mecha: Their combined form, Ruination.
  • Dub Name Change: They are referred to as Combatrons in the Japanese version. In addition, Mega-Octane is called Dolrailer, Ro-Tor is called Hepter, Armorhide is called Dangar, Rollbar is called Greejeebar, Movor is called Shuttler, and their combined form is known as Baldigus.
  • Five-Bad Band:
  • Leader Forms the Head: Actually averted, Scourge is technically the leader, but not part of Ruination at all. Mega-Octane forms the key component of Ruination. However, as second-in-command of the Decepticon group, he's still the superior of the other four components.
  • The Psycho Rangers: They were pretty much made because the Autobots outnumbered the Predacons. They all used to be Autobot protoforms to boot.
  • Surveillance as the Plot Demands: When an episode needs the Decepticons to find about some Autobot activity, it turns out Movor is spying from space.


Koji Onishi

Voiced by: Jason Spisak (English), Akiko Kimura (Japanese)

A young boy who befriends the Autobots and occasionally helps them on missions. He gets involved with their conflict because of his dad being kidnapped by the Predacons.
  • Dub Name Change: His first name is Yuuki in the Japanese version.
  • Kid Hero: He's just a child but still has occasions where he proves himself a useful ally.

Dr. Kenneth Onishi

Voiced by: Kirk Thornton (English), Shōji Izumi (Japanese)

Koji's father, who is captured by Megatron in order to find out secrets on how to get more power. He is eventually inadvertently rescued by Sky-Bite and reunited with his son.


Voiced by: Philece Sampler (English), Chieko Higuchi (Japanese)

A woman who appears in nearly every episode suffering a misfortune.
  • All There in the Manual: Her English name is only known from official Fox Kids episode summaries.
  • Butt Monkey: Pretty much every one of her appearances has her either suffer a misfortune or be relentlessly pursued by Side Burn while she's driving her red car.
  • Doomed New Clothes: One episode had her walking around wearing an expensive new hat she bought, only to have it knocked off and run over.
  • Dub Name Change: Kind of. Her name was given in neither the English version nor the Japanese version, but supplementary material for the Japanese Generation One continuity featured a character based on her named Junko Shiragami, who was eventually confirmed to be the same character after the Car Robots anime was considered to be part of the Japanese Generation One continuity rather than a separate continuity.
  • Recurring Extra: She's never a major character and her appearances are mainly done for the sake of some quick comic relief.
  • You Gotta Have Blue Hair: Her hair is teal.