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Voiced by: Toru Okawa (JP) (Armada), Katsuyuki Konishi (JP) (Energon), Taiten Kusunoki (JP) (Cybertron); Gary Chalk (EN) (All series)
The Autobot commander of the forces on Earth, Prime leads the team through the Mini-Con Battles, against Unicron (twice) and finally in an effort to save Cybertron and reality from the Unicron Singularity.
- A Father to His Men: Goes absolutely berserk after Smokescreen's near death. It's seen quite often throughout the show, which makes him a particular contrast to Megatron throughout the trilogy.
- Anti-Hero: While he's still, without question, a hero, it's worth noting that this Prime seems more willing to resort to violence compared to others. This is exploited by Sideways/Unicron who accuses Optimus of being as much of a Blood Knight as Galvatron, despite Optimus claiming he fights merely because he has to. Unicron is proven somewhat right in the Armada finale when Optimus and Galvatron have their final brawl in that series.
- Authority Equals Asskicking
- Big Badass Rig: A futuristic semitruck in Armada, a car transporter in Energon, and a fire truck in Cybertron. In the last series, it even lets him fly.
- Took a Level in Badass: In Armada, he was still a tough guy, but struggled a lot more in combat. By Cybertron, he is strong enough to kill Galvatron in a Single-Stroke Battle.
- Benevolent Boss
- Beware the Nice Ones
- Death Is Cheap: In Armada. He's back three episodes later.
- The Good Captain: As is tradition.
- The Hero: As is tradition.
- Look What I Can Do Now!: In Armada, he powerlinks with Jetfire, and later the pair link with Overload. Normally this equates into instant win. In Energon, he powerlinks with more or less the entire Autobot army, forming Optimus Supreme to fight a revived and very, very pissed off Unicron.
- In Cybertron, he combines with Leobraker to form "Savage Claw" mode and Wing Saber to form "Wing Optimus".
- Nice Guy
- Papa Wolf: Act like this towards the Mini-Cons.
Resident team rookie, Hot Shot has learned a lot of hard lessons throughout his career, much to the chagrin of some of the older bots.
- Crouching Moron, Hidden Badass: Despite his status as rookie, he is still very capable of kicking butt. He even gets to wield the Star Saber for a while in Armada.
- Took a Level in Badass: After his "Cybertron Defence" upgrade.
- Big Brother Mentor: To Sideswipe, who actually starts referring to him as his brother. Possibly to the kids too.
- Cool Car: He normally becomes a blue-and-yellow sports car, but in the second half of Cybertron, he is revived and upgraded so that he becomes a blue Humvee-like vehicle instead.
- Expy: Of Bumblebee, Hot Rod, and Cheetor.
- Friend to All Children
- Honor Before Reason: At least once, he rushed in to save two Velocitron natives in danger, shortly after Optimus had given him the order to not interact with said natives.
- Kid-Appeal Character: He almost always sports yellow in his colour scheme, and interacts with young humans the most.
- But in Cybertron, he's blue with yellow highlights. And in Energon the role is partially shifted to Ironhide, who disappears not too long after.
- The Lancer
- Lightning Bruiser: Though not quite as fast as Blurr.
- Pride Before a Fall: ...and totally let the power that the Star Saber granted him go to his head. It ends painfully.
- Rebellious Spirit
- Shoulders of Doom: That "wHy mY sHoUlDeRs huRt" meme? Guess where it came from.
- Super Speed: By the time of Cybertron.
- Took a Level in Dumbass: In Energon, he's depicted as a mature veteran. In Cybertron, he's back to being the immature rookie as he was in Armada.
- Young Gun: Probably not helped by the fact that his first foray into human culture consisted of spaghetti westerns.
Combat Medic of the Autobots, he may seem the Non-Action Guy, but harm his bots and you will regret it.
- Brains and Brawn: Red Alert's the brains, Hot Shot's the brawn.
- Badass Bookworm
- Combat Medic: Though he spent most of his time on the battlefield fighting, more than anything else.
- Expy: Of his G1 counterpart and Ratchet.
- Genius Bruiser
- Headbutting Heroes: With Hot Shot while on Velocitron, Though the pair eventually come to an understanding.
- Minored in Asskicking: He usually stays back at base in Armada, but he makes a pretty good showing in Cybertron.
- Mission Control
- Shout-Out: His Armada incarnation particularly shares a few cues with Robocop.
- The Smart Guy
- The Spock: Not entirely, but he is pretty reserved.
- Swiss Army Appendage: Lost his hand in battle, got a cool new...thing.
Smokescreen originally intended to be one of the team members who accompanied Optimus Prime to Earth, but he entered the spacebridge portal late, and as a result, he materialized some time later then they did.
- Big Fun
- Boisterous Bruiser
- Commuting on a Bus: in the Dreamwave comics, he'd go long stretches without appearances.
- Demonization: The kids all assumed that he was a Decepticon when he first appeared. Of course the fact that he chased them all over the place and didn't introduce himself properly probably didn't help much.
- Intergenerational Friendship: Out of all the team, he and Hot Shot seem to be particularly good friends.
- Nice Guy
- Stout Strength
- Those Two Guys: With Scavenger, in the comics.
Scavenger is an old war veteran. Who just so happens to be the Autobot who taught Optimus Prime everything he knows.
- The Big Guy
- Caped Mecha
- Chuck Cunningham Syndrome: Disappears after Armada.
- Genius Bruiser
- Old Master: He taught Optimus Prime after all.
- Old Soldier
- Reverse Mole: Though given the folder he's been placed under you probably guessed this already.
- Senior Sleep Cycle: in the middle of a training session. Hot Shot is not impressed.
- Stealth Mentor
Cool and aloof, Blurr is one of the later additions to the Autobot ranks. He initially thought of the Mini-Cons as mere tools, a thought which Hot Shot slowly shot down.
- Cold Sniper
- Defrosting Ice King: Towards Hot Shot.
- Fantastic Racism: Thinks of the Mini-Cons as just weapons for a long while.
- Grumpy Bear
- Ineffectual Loner: In his introduction.
- Chuck Cunningham Syndrome: Disappears after Armada and never reappears again (unless you think the toyline character from Cybertron is him).
The second-in-command of the Autobots on Cybertron, Jetfire departed Cybertron and arrived on Earth in order to help Optimus and the others.
- Afraid of Needles
- Arch-Enemy: Starscream was his rival in Armada and Energon. Thundercracker is his in Cybertron.
- Arrogant Kung-Fu Guy: Like this for a long while in Armada.
- Australian Accent
- Boisterous Bruiser: Very very boisterous.
- Cool Starship: He becomes a space shuttle in both Armada and Energon.
- Cool Plane: In Cybertron, he becomes a cargo jet with a space shuttle front half.
- Deadpan Snarker: Definitely in Cybertron.
- The Lancer: While the Bots don't form a Five-Man Band per se, he has shades of this trope.
- Large Ham: In Armada, not so much in Engeron or Cybertron.
- Number Two: It does seem a little odd that Optimus would pick a hot-head like him to be second in command. That is, until you see them together in battle.
- In the comics, however, he's much more calm and reserved.
- One-Man Army
- Tall, Dark, and Snarky: Again, in Cybertron.
- Voice: Samuel Vincent
Hot Shot's newest partner, it didn't take long for Sideswipe to be captured by Hot Shot's friend-turned-foe, Wheeljack. Sideswipe was saved but the experience taught him a harsh lesson about war, leading him to quickly sober up.
Leader of the Decepticons. Megatron is a malicious, powerful leader. A refined, focused general who treats his men with little care, yet still infuses them with genuine respect for him and the Decepticon cause.
- Affably Evil: Armada. When it comes to the next two series, however...
- Antagonist in Mourning: Optimus being dead wasn't nearly as fun as he thought it would be.
- Badass Boast: From the comic - "You are in my way, and anything in my way, I GO THROUGH! My troops may have fallen, but I AM MEGATRON!"
- Bad Boss: Became more and more his shtick with each incarnation. In Armada dents in his reign and planning started occurring as a result of his abusive and control obsessed treatment of his Decepticon army. By Energon he is a pretty straight up violent sociopath who will attack, reformat or kill those who remotely defy him, while in Cybertron he is a callous manipulator who sees all those that serve under him as dispensable pawns.
- Big Bad: Until Unicron shows up. Played straight in Cybertron, as Unicron has long since disappeared.
- Blade Below the Shoulder: Only seen near the end of the Armada series, but it does massive damage when it finally shows up.
- Card-Carrying Villain: Tends to display snarky awareness to being an inflicter of evil, especially in the dub.
- Cool Car: One of his two alt-modes (he is a triple changer) in Cybertron
- Cool Plane: His main alt-mode in Energon, and one of his two alt-modes (again, he is a triple changer) in Cybertron.
- Create Your Own Villain: Reversed. Arguably the Megatron incarnation most apt at making enemies out of his own Decepticon soldiers due to his abusive, power hungry ways. Taken Up to Eleven in Cybertron where all of his minions eventually Heel–Face Turn after he renders their lives meaningless.
- Defiant to the End: In all three series, he ultimately chooses death over submitting or accepting control to Unicron or another power. He may be a brutal, dastardly tyrant, but at least he's damn well consistent about it.
- Did You Just Punch Out Cthulhu?:
- It was his death that stopped Unicron, in Armada and Energon.
- In the comic he defeated G1 Galvatron in one-on-one combat, albeit with help from the Star Saber.
- Evil Laugh
- A Father to His Men: Starts to slip towards this in Armada, particularly after his men start taking issues with his needless hostilities and prove themselves very capable of fighting back if pushed too far.
- Heroic Sacrifice: At the end of Armada he chooses to fall to his death so that he can end the war a deprive Unicron of the power he needs to revive.
- Killed Off for Real: In the 2nd to last episode of Cybertron, he dies again, but unlike the previous shows he never comes back.
- More Dakka: In Armada, he could activate his "Full Blast" mode, effectively turning him into a walking minigun.
- Noble Demon: During Armada only. Afterwards, it got much worse, and with more or less no explanation why.
- One-Man Army: The comic version manages to lay waste to four armies worth of Terrorcons in a matter of minutes.
- The Only One Allowed to Defeat You: Optimus Prime is his to destroy. Sixshot in particular suffered very brutal dismissal for trying to dispose of Optimus himself throughout Energon, a disposition that did not remotely waver when Sixshot half slagged Galvatron to do so.Sixshot: *charges and aims laser at Galvatron* Optimus Prime will be mine!Galvatron: NEVER!!!
- Pragmatic Villainy: Despite being a Bad Boss, he is smart enough to keep most of his Decepticons motivated and capable, only truly disposing of those that betray him. Many of his minions even get upgrades at his choosing. He best exemplifies this through a Hannibal Lecture to Optimus in Cybertron, having kept his minions loyal to him until he finally achieved his goals and didn't need them anymore.
- Roaring Rampage of Revenge: In the Energon comics. Ten years of pent up anger get spent in the space of a few minutes.
- Tank Goodness: His alt-mode in Armada.
- Team Dad: A horrible abusive dad, but a dad nonetheless. This changes after Armada.
- Took a Level in Jerkass: In Energon, his Noble Demon and Affably Evil traits mysteriously vanish with no explanation, and he becomes even more ruthless and crueler then he already was. He gets even worse in Cybertron.
- Villain Teleportation: In Dreamwave's Energon comics, he rebuilt himself with a fancy teleportation ability that can take him across interstellar distances in seconds. It does come with the drawback of soaking up a lot of energy, though.
- Worthy Opponent: To Optimus Prime in Armada. To the point that he falls into a depression when he actually defeats him and hands control of the Decepticons over to him at the end of the series.
Megatron's poorly-treated second in command. He loathed Megatron, because of the sheer mistreatment and contempt Megatron often piled onto him, Megatron always seemed to expect to much from him.
- Adaptational Badass: No Starscream since him has come close to doing what he's done in Cybertron. Fights Primus twice and lives? Check, though he still loses both times. Only non-comic relief Decepticon left alive at the end of Cybertron? Check. Fought off eleven Autobots to steal the Omega Lock? Check. While his living up to the trope he named has been done by other Starscreams, he's done the best to date.
- Adaptational Heroism: This version of Starscream is by far one of the kinder versions to hit the screen, as opposed to his Transformers: Generation 1 and Beast Wars incarnations, both of which were petty and treacherous. This changes for no apparent reason when he returns in Cybertron, although it's implied that he Came Back Wrong.
- The jarring change in personality makes more sense with the knowledge that in Japan, Galaxy Force/Cybertron has no connection to Micron Legend/Armada and Superlink/Energon.
- Adaptation Name Change: In the original Japanese edit of Energon, his character was in fact Nightscream, a separate Transformer who only had coincidental resemblance to Starscream. Only the dub establishes him as a true reincarnation to the character.
- Adaptational Villainy: In the comics, he lacks any of his redeeming traits from the show.
- Anti-Villain: After he returns to the Decepticons, his loyalties are clearly conflicted.
- Back from the Dead: He dies at the end of Armada and Energon, but returns not long after each time.
- Big Bad Ensemble: In Cybertron, he eventually breaks away from Megatron and starts fighting both him and the Autobots.
- Breakout Character: For Armada.
- Break the Haughty: Though he wasn't as much of a jerk as most other examples.
- Came Back Wrong: His Cybertron incarnation is far less heroic and much more malicious than before.
- In the Energon comic, he comes back as an energon ghost... and completely insane to boot.
- Composite Character:
- Cool Plane: Becomes a futuristic fighter jet in Armada, an F-22 Raptor in Energon, and a G1-inspired tetra-jet in Cybertron.
- Dark Chick: In Armada and Energon.
- Defector from Decadence: Though only temporarily, he tries to switch sides and join up with the Autobots in Armada. It doesn't work out for a mix of reasons and he soon rejoins the 'Cons, but his loyalties are clearly conflicted afterwards.
- Determinator: In all series of the Unicron Trilogy he has his moments. The Cybertron incarnation in particular is always trying to get ahead through schemes, and just never gives up. Even at his lowest point after his battle with Landmine, he pulls himself back up and displays such power equivalent to Galvatron's, the Autobots are defeated by his shock waves. His speech to Galvatron basically boils down to he's risked everything for power, and he's not going to yield.
- The Dragon: Throughout most of the trilogy.
- Evil Sounds Raspy: His voice in the English dub.
- Expy: Of Dinobot from Beast Wars, though he also shares some traits with the original Starscream.
- Heel–Face Revolving Door: He eventually defects to the Autobots in Armada, then returns to the Decepticons after some problems force him to leave, then sacrifices himself to stop Galvatron ignoring the threat of Unicron. He spends some of his time worrying about his loyalties in Energon, but this is given less focus until he sacrifices himself towards the end.
- Heroic Sacrifice: Twice. The first happens when he keeps shooting at Unicron in an effort to convince Galvatron that both sides must ally. The second occurs at the end of Energon, when he follows his master into the giant sun.
- Noble Demon: In Armada and in Energon. Not so much in Cybertron, since he Came Back Wrong.
- One-Man Army: In Cybertron, mixed with Villainous Valor.
- Only Sane Man: In Armada, he's pretty much the only Decepticon who's both sane and competent.
- Proud Warrior Race Guy: Mostly Armada, but still retained traits of this throughout the rest of the trilogy.
- The Starscream: Not until Cybertron, and when he does, he jumps straight in.
- Token Good Teammate: In Armada, he's the only Decepticon with a sense of honor. He even pulls a Heel–Face Turn at one point and later gets a Redemption Equals Death.
- "Well Done, Son!" Guy: Strongly gives off this vibe.
Demolishor is extremely strong and acts very serious at all times. He is wholly devoted Megatron and the Decepticon cause, unquestionably following orders at every turn.
- Battle Butler: To Megatron.
- Crouching Moron, Hidden Badass: Saves Megatron numerous times, but the first time he does in Energon, much tragedy ensues.
- Co-Dragons: Shared this post with Starscream in Armada until Thrust arrived. Returns to this position for a brief while in Energon until his rebuild.
- Dumb Is Good: He's the closest thing to a "nice" Decepticon that you're going to find, aside from Starscream. Though interestingly, those two don't get along at all.
- Expanded Universe: He doesn't appear in Cybertron, though a recolour of his original form was released as part of the toy-line.
- Hand Blast: His fingers are gun barrels.
- Heroic Sacrifice: In Energon, he saves Megatron's life at the cost of his old body being wrecked. He gets very poorly repaid for this.
- No Good Deed Goes Unpunished: In Energon, he saves Megatron's life and gets his old body wrecked. Rather than repair him and leave it there, Megatron transplants him into a body he doesn't want to be in and tampers with his memory.
- Pet the Dog: A quite memorable one in Armada; following a defeat, Megatron decides to pass his nerves on Starscream by taking him to a room and delivering him a No-Holds-Barred Beatdown. Demolisher, realizing Megatron might well kill Starscream, breaks through the door to take his defense.
- The Rival: To Starscream, for the position of Megatron's right-hand man.
- Tank Goodness: In Armada. In Energon, he becomes a dump truck instead.
- Took a Level in Dumbass: After his body is destroyed in Energon, he is rebuilt into a far dumber ape-like format with little of his memories of before, usually playing an incompetent comic relief role alongside Snowcat.
- Undying Loyalty: Played mostly straight to Megatron, but the writers do subvert it at the end of Energon. When Galvatron hurls himself into the sun to stop Unicron and Starscream and Mirage follow, he and Snowcat don't bother to do the same.
- Yes-Man: Rarely questions Megatron, although his Pet the Dog moment proves he's not totally obedient.
Cyclonus has a very "trigger happy" personality, laughing and cackling as he fires his weapons almost completely at random on the battle field.
- Axe-Crazy: Though it comes across as more annoying than genuinely frightening.
- Bunny-Ears Lawyer: Despite being cowardly and crazy, he's efficient when it comes to combat... usually.
- Butt-Monkey: A lot of bad stuff happens to him. Sometimes he deserves it.
- Dark Chick: For the Cons.
- Evil Laugh: Has a mad cackle until Megatron changes him into Snowcat in Energon.
- For the Evulz: Seems to have almost zero sense of camaraderie, and an even smaller grasp of right and wrong.
- The Hyena: Laughs like an absolute madman.
- Leeroy Jenkins: There's no strategy for him, beyond wildly shooting at things.
- Minor Injury Overreaction: He screams like a little girl every time he gets hit while in vehicle mode, which as you can imagine... happens a lot.
- Stupid Evil: Cyclonus is not a smart guy.
- Trigger Happy: He loves to waste all of his ammo all at once.
Thrust is Megatron's top intelligence officer and master tactician.
- Adaptational Heroism: In the comics, Thrust is not as cowardly or treacherous, and by the time of Energon he's one of the few Cons still loyal to Megatron.
- Ain't Too Proud to Beg: With Megatron, not that it did him any good.
- Butt-Monkey: The Dreamwave version spends most of his screen time getting his ass kicked.
- Composite Character: While he has characteristics of Generation One Thrust (a overconfident exterior that hides the Dirty Coward underneath, the cone-head design, etc.), he inherits several of G1 Starscream's traits as well, being Megatron's outwardly sycophantic second-in-command who in actuality desires only personal power and who betrays Megatron to get it (Armada Starscream was more of a Noble Demon, making this especially noticeable).
- Dangerous Deserter: Defects to serve Unicron.
- Dirty Coward: He talks a big game when he thinks Unicron will help him, but the moment he gets in trouble, he's begging Galvatron to save him.
- Family-Unfriendly Death: He gets crushed by Unicron. Squesh!
- Jerk Ass: The other Cons often get sick of him for this reason.
- Karmic Death: He definitely got what was coming to him.
- Killed Off for Real: Unlike other instances, Thrust does not come back.
- Kneel Before Zod: Tries to pull it on Galvatron, and gets crushed shortly after.
- Professional Butt-Kisser: He's incredibly sycophantic when it suits him.
- Rewarded as a Traitor Deserves: Thrust dies by being crushed to death during Unicron's transformation, just after gloating to Megatron about his betrayal no less.
- Smug Snake: He's a decent strategist, but not good at improvising, which means his ego far overshadows his ability.
- Spared by the Adaptation: The Energon comic shows him as in charge of Cybertron's security systems and one of only two Cons to not immediately defect at the start. It probably helps that in that continuity, he didn't defect to Unicron and is much more loyal.
- The Starscream: He betrays Megatron and allies himself with Unicron in an effort to consolidate more power.
- Stupid Evil: He overestimates himself far too much when he defects.
- The Strategist: He's actually pretty good at strategy, just not very good at improvising.
- Unwitting Pawn: Sideways manipulates him like a pro.
- Villainous Breakdown: As Unicron starts crushing him.
- Villain Team-Up: He breaks away from the Cons to ally with Sideways and Unicron.
- Would Hurt a Child: Don't forget that earlier on, to escape the Cons and Autobots he threatened the kids.
The lumbering giant Tidal Wave is the largest of the Decepticons, and proved himself a very powerful foe for the Autobots.
- The Brute: For the Cons, being their go-to muscle.
- Dumb Muscle: He's not very intelligent, but is by far one of the toughest.
- Elite Mook: He's not just big, he's really tough to beat.
- Evil Sounds Deep: He's a giant Decepticon, what did you expect?
- Giant Mook: Even after being sized down, he still towers over most of the other cons.
- Hulk Speak: Tidal Wave is one of the least eloquent characters in the franchise.
- Sci-Fi Writers Have No Sense of Scale: In Energon, his recoloured form is also much smaller, making him a little taller than Cyclonus. Yeah...
- Undying Loyalty: To Megatron. Which may come across as oddly amusing, considering his VA voiced the treacherous (and much higher pitched) Terrorsaur.
- Voice: Michael Daingerfield
Wheeljack, formerly an Autobot serving under Hot Shot. When Wheeljack was pinned beneath some debris during a fire, Hot Shot was forced to leave him to get help, but was prevented by his superiors from returning. Wheeljack believed that Hot Shot had abandoned him, and when Megatron found and rescued him, he swore loyalty to the Decepticon commander.
- Adaptational Villainy: The previous incarnation of Wheeljack was a Gadgeteer Genius firmly on the side of the Autobots. In Armada, Wheeljack is a former Autobot turned Decepticon seeking revenge on a comrade that actually tried to help. He does eventually reform, or at least forgives Hot Shot.
- Arc Villain: Only in Past I and Past II.
- Best Served Cold: He's not here for revenge. Except he is.
- Demoted to Extra: The Dreamwave comics utterly ignore his history, just showing him in the background on occasion.
- Et Tu, Brute?: He assumes that Hot Shot betrayed him when in reality, the latter actually went to get help.
- Evil Former Friend: Hot Shot's, though when they fight side by side against Unicron he does seem to be warming up to him again.
- Fallen Hero: He is a former Autobot.
- Fire-Forged Friends: After initially wanting to kill Hot Shot, he grants him an audience with Megatron, and their dialogue when fighting against Unicron indicates that their friendship may be restarting.
- Heel–Face Turn: Seemingly by the end, he's back with the Autobots again, or as at least forgiven Hot Shot.
- I Owe You My Life: Regardless of what he knows and doesn't know about the incident, Megatron truly did save him. After he joins the Decepticons, he never leaves or betrays them, no matter what amends are made. This proves useful once the Autobots determine that Unicron is the greater threat.
- Kick the Son of a Bitch: In "Past II", when he shoots Thrust out of the sky. Not to say that Thrust didn't deserve it, from what we see of him.
- Mistreatment-Induced Betrayal: He believes that Hot Shot abandoned him to die earlier in the war. The reality is rather different.
- Noble Demon: He does grant Hot Shot an audience with Megatron.
- Poor Communication Kills: He wasn't abandoned quite as completely as he thinks he was.
- Revenge by Proxy: He takes Sideswipe hostage to get revenge on Hot Shot.
- Scars Are Forever: He has a giant scar over his old Autobot logo.
- That Man Is Dead: He does not like being reminded about his old allegiance, almost viewing it as a different life.
- What Happened to the Mouse?: Out of all the Decepticons that survived the show, Wheeljack is noticeably missing from Energon. It is likely that he reformed, given how he's forgiven Hot Shot by the end.
Bradley "Rad" White:
Rad is the one who reactivated the Mini-Con ship while exploring some caves, and is inadverdently responsible for the restarting of the Autobot/Decepticon war.
- Audience Surrogate
- Battle in the Center of the Mind: He once helped the Mini-Cons break Unicrons' mental hold on them.
- Beware the Nice Ones: May only be a human, but he's got guts.
- Put on a Bus: The comic pretty much ignores the kids once Simon Furman takes over writing duties.
- Ordinary High-School Student
- Ship Tease: Heavily with Alexis.
- Spanner in the Works: His interactions with High Wire in the ancient past are what ruined Unicron's original plans to use the Mini-Cons.
Carlos is Rad's friend and was with him when he reactivated the Mini-Cons.
- Audience Surrogate
- Ordinary High-School Student
- Plucky Comic Relief: He's full of jokes... most of them bad.
- Put on a Bus: Along with Rad and Alexis in the comics.
- Skintone Sclerae: Except for a couple of times when the show was having its Off-Model moments and gave his eyes whites.
- Token Minority
Alexis Thi Dang:
Alexis, along with Rad and Carlos befriended the Street Action Team Mini-Cons and Autobots on Earth. She frequently helped them by teaching them the ways of Earth.
- Audience Surrogate
- Deadpan Snarker
- Interspecies Romance: It certainly looked like she enjoyed being Starscream's friend more than the other kids ...except maybe Fred.
- Put on a Bus: All but ignored by the comic along with the other kids after Furman takes over writing duties.
- Only Sane Man: She thinks she is anyway.
- Ordinary High-School Student
- Ship Tease: Heavily with Rad.
- Tsundere: Ugh, boys.
A primal force of evil, his origins lost to the mists of time. He is the embodiment of all darkness and hate that lurks in the hearts of all beings.Voiced by: Mark Acheson, David Kaye (when Megatron is possessed in Energon)
- Back from the Dead/ Death Is Cheap: This happens an incredibly frequent amount of times. You honestly wonder why the bots try to put him down again when he just gets back up.
- The first is implied at the end of Armada, when his planet form is seen floating behind an unknown body. It's later confirmed at the start of Energon that he's just mentally inactive.
- The second and third attempts happen during Energon. He manages to reactivate his body form and possess Megatron, then dies a few episodes later at the hands of Optimus Supreme. Then after that he possesses Megatron yet again, turning him into the incredibly large Galvatron in an attempt to recreate his body. This is thwarted when Galvatron hurls himself headfirst into a sun.
- A fourth and seemingly definitive example from the Cybertron comic: Unicron frees himself from the Black Hole by hijacking a smaller Transformer's body, then recreates his body some time later. This time, he flees before Primus and the Autobots can defeat his weakened body.
- Brown Note: In the comics, Unicron speaking causes everyone pain.
- Eldritch Abomination: As is tradition, though this helped to codify this part of his character.
- Evil Sounds Deep: Voiced by Mark Acheson in Armada (and a ridiculously small amount of Energon). Downplayed when he's voiced by David Kaye.
- Greater-Scope Villain: To Megatron. While Megatron may be the Big Bad of the show, Unicron far eclipses him in terms of threat, while being detached from the main show.
- Omnicidal Maniac: This is the trilogy that established this trope best for him.
- Planet Eater: Though unlike his debut appearance, he doesn't physically eat them, rather breaking the planet into smaller pieces and then devouring them. Energon shows this best.
- Sci-Fi Writers Have No Sense of Scale: Not as bad as his first appearance due to the fact that he rarely engages any Cybertronians physically, but when Thrust is perched/standing on his shoulder you do run into some fairly notable issues, notably the fact that he should theoretically be a speck from the distance we see him.
- Voice: Paul Dobson (in Armada)
An intergalactic drifter, Sideways transforms into a motorcycle. His consciousness is apparently housed within the smaller robot head that rides his alternate mode, which can split into two components.
- Anti-Villain: He was out to avenge his planet, turning to Unicron in hope that this would help him achieve his goals. The Dark Side Will Make You Forget soon kicked in afterwards, although by Cybertron he remembers again.
- A Wizard Did It: It's implied Unicron's dark energy preserved him.
- Back from the Dead: In Cybertron.
- Badass Biker: Well, he is a badass bike.
- Breakout Character: He was cited by many as one of the few redeeming qualities of the first half of Armada.
- Canon Immigrant:
- The Dark Side Will Make You Forget: Servitude to Unicron caused him to forget that he was hoping to avenge his planet, and turned him into the Jerkass we see him as in Armada. Subverted in Cybertron where he remembers again.
- Demoted to Extra: The Dreamwave comics just have him hanging around in the background, even when Unicron shows up.
- Digitized Hacker: It allows him to survive being sliced up.
- The Dragon: To Unicron in Armada only.
- Double Reverse Quadruple Agent: In both Armada and Cybertron, though both times he does have different agendas.
- Expy: Averted with his other appearances- possibly. It's thought to be the same guy throughout the multiverse.
- Even Evil Has Loved Ones: It is implied that Unicron was in possession of Sideways during Armada, thus temporarily draining any sense of compassion the latter may have had. In Cybertron, with Unicron destroyed, it is shown that Sideways does has the ability to care; in this case for the inhabitants of his destroyed world, including Soundwave and Laserbeak.
- Evil Sounds Deep: When played by Paul Dobson.
- Faux Affably Evil: In Armada.
- Guttural Growler: In Armada.
- The Heavy: After he appeared, he gradually shifted towards this, particularly as his boss was not shown for most of the series. Even when his boss appears, he serves as the representative and does most of the fighting.
- Kick the Dog: He enjoys doing this. Particularly when it simultaneously helps his goals and hurts others.
- Laughably Evil: In Cybertron.
- Manipulative Bastard: He can quite easily turn people into his puppets when he needs to (not literally). Even in Cybertron, he has a tendency to do this, as he manipulates both sides again, taking advantage of their amnesia as a result of the Unicron Singularity.
- Mind Screw: Unicron, Sideways, Sideways' Mini-Cons. It's kind of hard to tell where they each end and the others begin, which isn't helped by the shaky dub. Of course, he enjoys running on this.
- The Mole: To Unicron, betraying the Autobots and then the Decepticons in the process.
- Mouth of Sauron: His boss Unicron can talk, but to an extent Sideways still serves as this.
- Ninja Pirate Zombie Robot: A Badass Biker whose altmode is a Cool Bike, who also exists as a Digitized Hacker. This also goes with the fact that he's a Transforming Mecha. Also implied that he is the same character throughout the whole multiverse.
- Playing Both Sides: He initially screws over the Autobots by pretending to be a Decepticon, then in turn he screws the 'Cons over by leaking information of theirs to Unicron.
- Troll: He enjoys screwing people over, particularly when it helps him advance his plans.
- Villain Decay: In Cybertron; He started out as a shadowy manipulator, playing both sides through sheer cunning. He became something of a joke in the later episodes, being outwitted and made a fool of by the humans (Though he gets better during his last few appearances). He even lampshades it at one point:"I'm the one who's supposed to be pulling everyone's strings!"
- Villainous Friendship: With Soundwave in Cybertron.