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Characters: Teenage Mutant Ninja Turtles
Characters from the long-running comic book series Teenage Mutant Ninja Turtles, as well as some exclusive to some of its non-comic incarnations.
Note: Several characters' allegiances shift between incarnations. They have been placed in the side they are most usually associated with.

Characters exclusive to the following series can be found here:

Comic Books

The Mirage books

Cartoons

Teenage Mutant Ninja Turtles (1987)

Teenage Mutant Ninja Turtles (2003)

Teenage Mutant Ninja Turtles (2012)

Films

The Live Action Trilogy

TMNT

Live Action TV

Ninja Turtles: The Next Mutation
    open/close all folders 

    Heroes 

As a whole

Leonardo

Leads. Always in control. Does anything to get his ninjas through. Identifiable by his blue bandana and his twin swords.
Appears in: All incarnations.

  • All-Loving Hero: Even after all the betrayals and all the terrible things he's seen, Leo still expects the best out of people.
  • Authority Equals Asskicking: Consistently the most skilled Turtle, he falls into the leadership role by default.
  • The Chains of Commanding
    • Michaelangelo actually notes this in an episode of the 4Kids series: Leo takes the burden of being the leader so his brothers can do what they want: Dontaello's free to pursue his technological inventions, Raphael's free to let loose and fight, and Mikey's free to just relax because their brother's in control.
  • Badass
    • Took a Level in Badass: In all incarnations, the turtles all go through this, but Leonardo is the one who most clearly demonstrates the trope. One example is in the first season of the 4Kids cartoon where he can barely handle fighting one of the Foot Elite, and is nearly killed trying to take on all four. By the end of the fourth season, he not only takes on all four without apparent difficulty, but also bests Karai, the incumbent Shredder, in the process.
  • Big Brother Instinct: Even though he's never officially stated to be the oldest.
  • Bookworm: He seems to be this in the 1987 incarnation. In the "Leonardo is Missing" episode, he stays at the lair and reads while the other turtles go to an arcade.
  • Child Soldiers: Of the four, it's Leonardo who exemplifies this the most.
  • Combat Pragmatist: Leonardo's sense of honor dictates that he fight fairly, but when he's pushed into a corner or there is no other alternative, he will not hesitate to slice off your head.
  • Cultured Warrior: Depends on the writer, but if one of the turtles is going to be in touch with Japanese traditions, it's gonna be Leo.
  • Depending on the Writer: A lot of tropes carry over between series, but some are fairly unique. Leonardo is always the skilled, "most leader-like", and responsible turtle. But whether its accomplished by being an overly serious workaholic, a respectable older brother figure, bossy teacher's pet, meditative and spiritual, wanting to emulate fictional archetypical heroes or any combination of the above depends on the series and sometimes the story arc. Overall he is one of the most consistent across all interpretations.
    • One very good (actually very bad) example is the 2007 movie written by Kevin Munroe, who clearly had a favorite turtle. Not only are Leonardo's traits exaggerated and warped to provide an antagonist/foil for Raphael, but his personality and background are sacrificed for the movie's plot.
  • Determinator
  • Dual Wielding
  • Emotions vs. Stoicism
  • The Face
  • Four-Temperament Ensemble: Melancholic.
  • Guilt Complex: He is very bad with this. Very bad.
  • Heroes Prefer Swords: As the leader of the group, Leo gets the shiny swords.
  • Heroic BSOD: Mirage Comics, 4Kids Series.
  • Heroic Spirit: A big reason why he's a determinator.
  • Heterosexual Life-Partners: With Miyamoto Usagi.
  • Honor Before Reason
  • Indy Ploy: Alarmingly, a lot of his plans qualify as this. Most of the time, however, they actually work.
  • Innocent Blue Eyes: In the 2012 Nick series, obviously. They help solidify his youth and inexperience.
  • Jack of All Stats: Videogames.
  • Katanas Are Just Better: Obviously.
    • Although Leonardo's swords are often much more closely modeled around the ninjato.
  • Knight Templar: Leonardo's story arc in the 4th season of the 4Kids series have him nearly cross over into Knight Templar territory. His rage gets so bad he actually wounds Splinter and has to be sent away to Japan to learn from Splinter's master.
  • The Leader
  • Martial Pacifist: Mirage Leonardo, in the future.
  • Master Swordsman
  • The McCoy: Though he overlaps with The Kirk. Along with Mikey, he's usually presented as the most empathic of the turtles, whether it's granting mercy to an overmatched foe, or saving the life of a mutant two seconds after she tries to kill him.
  • Metamorphosis
  • Named After Somebody Famous: Leonardo da Vinci.
  • Nerves of Steel: Captured by aliens, trapped thousands of miles from Earth with no way back, poisoned and weaponless? For Leonardo, that's a training run.
  • No-Holds-Barred Beatdown: He gets into quite a few of these. If he's not on the receiving end, he's usually administering it.
  • Old Master: Mirage Leonardo, in the future.
  • A Protagonist Shall Lead Them: Leonardo usually gets the most lines of dialogue, and most of the stories are told from his perspective. Even when he's not presented as the main character (such as the TMNT movie), he plays a major role.
  • Red Oni, Blue Oni: The blue to Raphael's red, of course!
  • Samurai: Leonardo is technically a ninja, but a lot of the tenets he quotes are in line with samurai. It's no surprise he and Usagi got along swimmingly.
  • Scars Are Forever: To an extent. In the Season 3 finale of the 4Kids series, Karai—whether accidentally or not—stabs Leo. Her sword goes through his shoulder and out the side of his upper shell. All throughout Season 4 the crack in his shell remains as he descends into Knight Templar territory, and even after he recovers it refuses to heal. Not until the Fast Forward reboot, anyway.
  • Sliding Scale of Idealism Versus Cynicism: In the 4Kids series, he starts out at the very end of the Idealism scale, even believing the best of the Shredder and then his daughter Karai. As the seasons progress he shows signs of being capable of sliding down the other way—he does this in the fourth season—though he remains mostly rooted in idealism.
  • The Spartan Way: All the turtles train hard, but Leonardo—whether or not by his own design—is almost always subjected to the kind that involves complete isolation, distant countries, and/or imminent death.
    • In the 4Kids series, Leonardo as a child was suffering from a fear of heights. Splinter brings him to the top of a gigantic reservoir and pretends to be in danger of falling. Leonardo forces himself to crawl out and save him, and apparently conquers his fear in the process.
  • Standardized Leader: Usually in his most basic, stripped-down incarnations.
  • Team Dad
  • Thou Shalt Not Kill: Mirage Leonardo, in the future.
  • Took a Level in Jerkass: During the first half of the 4Kids cartoon's fourth season, combined with Heroic BSOD. He had a really good reason.
  • Weapon of Choice: Twin Katana.
  • "Well Done, Son" Guy: Most of what Leonardo does is to please Splinter. Whether or not this is a good thing is still a debate in fandom.
  • What the Hell, Hero?: Leo gets this in the 4Kids cartoon from his brothers and Splinter when he's on the verge of becoming a Knight Templar.
  • Wise Beyond Their Years: In childhood flashbacks, he's usually the turtle acting like the adult. And for a teenager, he deals very well with duties and responsibilities most adults would be unable to fathom.

Donatello

Does machines. Is the brains of the bunch. Marked with a purple headband, and fights with a bo staff.
Appears in: All incarnations.

Raphael

Is cool but crude. Throws the first punch. The muscle with the most attitude. He wears red and fights with a pair of sais.
Appears in: All incarnations.

Michelangelo

Is a party dude. Wiseguy. The wild one and one-of-a-kind. The most laid-back of the turtles, who lists among his interests pizza, comic books, and more pizza. Wears an orange-yellow bandana, and duels with nunchaku.
Appears in: All incarnations.

  • Annoying Younger Sibling: Except in the '87 series where he's second eldest to Leonardo. Leonardo listed as 16, Mike 15 1/2, and Raph and Don both 15.
  • Ascended Fanboy: Sorta, he's a big comic book geek who happens to be a superhero himself.
    • In the Mirage comics he's a comic book geek who gets to write for comic books and even becomes a published novelist.
  • Attention Whore: 4Kids series.
  • Badass
    • Badass Adorable: Silly, loves him some comic books, childish, always willing to crack a joke and and can kick tons of asses with his nunchucks. Yup. Taken to it's furthest extreme in 2007's TMNT where Mikey is the shortest turtle and has huge adorable Innocent Blue Eyes (we know it doesn't make sense, but it's cute, dammit).
    • Crouching Moron, Hidden Badass: (4Kids series): Although he can always kick ass, his skills will occasionally take a bump as the plot requires, allowing him to take on foes that would normally defeat him or his brothers.
  • Beware the Nice/Silly Ones
  • Big Eater: In the Fred Wolf cartoon, he'd often annoy his brothers by eating all the pizza.
  • Brilliant, but Lazy: He's usually portrayed as having great potential, but because of his more laidback personality, he'll focus on something more fun instead.
    • This is enforced with his Weapon of Choice (the chucks, see below), the laziest of the turtles is the one wielding the most complex and difficult weapon. That's not something one can do without a gift for it.
  • Butt Monkey: Especially in the cartoons. If any of the Turtles klutzes out or has something bad happen to them for comic effect, it's Michelangelo.
  • Catch Phrase: The most famous "Cowabunga!" as well as "Booyakasha!" in the Nickelodeon cartoon series.
  • Characterization Marches On: Depending on the version, really - in the comic books, he isn't really a party dude, but more of a down-to-Earth type of guy as opposed to his brothers. He was able to author a book at one point.
    • In the Mirage comics he often traded back and forth with Donatello as The Smart Guy with Donny being the expert in science and technology while Mikey's specialty was culture and literature.
    • Ironically when compared to his later incarnations, Mikey is also one of the most violent of the group in the Mirage comics. Only Raph (who can border on Ax-Crazy) is worse.
  • Cloudcuckoolander
  • Depending on the Writer: A lot of tropes carry over between series, but some are fairly unique. Mike is always the 'fun guy' and comic relief. But he ranges from being down to earth and artistic, to a laidback surfer dude, to an egocentric prankster, to a hyperactive ditz. What counts as the hip and cool Kid-Appeal Character changes the most between series over the 25+ year history of the franchise. He's usually a reflection of the times.
  • Dope Slap: Gets it a lot in the 4Kids series.
  • Foolish Sibling, Responsible Sibling: The foolish to Donatello's responsible.
  • Four-Temperament Ensemble: Sanguine.
  • Fun Personified
  • Genre Savvy: 4Kids series.
  • Hard Work Hardly Works: Although the trope is disproved by Leonardo, there is an element of this to Mikey's abilities, and he is consistently considered to be the most naturally gifted of the turtles despite his lack of focus and dedication to training.
  • The Heart: Although he exasperates his three brothers on a constant level, when a serious rift between their bond takes place, he usually is the one to try and patch things up...usually via humor.
  • Hidden Depths
  • Hooks and Crooks: Occurs in later seasons of the original cartoon, due to censorship in England.
    • He also uses one briefly in the 4Kids cartoon as a callback.
    • The Nickelodeon cartoon has him using this almost as much as his nunchaku.
  • Innocent Blue Eyes: In the 2007 movie, the Back to the Sewers incarnation of the 4Kids series, and the new Nick series. They go a long way toward making him look adorable.
  • Jumped at the Call: 4Kids series.
  • Keet
  • Kid-Appeal Character
  • Kindhearted Cat Lover
  • The Knight Who Says Squee: 4Kids cartoon.
  • Large Ham: In almost every incarnation.
  • Lightning Bruiser: Michelangelo runs faster than Leo and Don and has more health than all of his brothers. However, his nunchucks are slow and have little range (Turtles in Time, The Arcade game, Manhattan Project).
  • Metamorphosis
  • Named After Somebody Famous: Michelangelo Buonarroti.
  • Plucky Comic Relief
  • Real Men Wear Pink: In Back to the Sewers he was positively delighted when April asked him to be her Maid of Honor, when people tried to call him the more gender-neutral "Turtle of Honor" he would correct them.
    • In the Mirage comics he was the Team Chef, even cooking an elaborate Christmas dinner in one issue.
  • The Red Mage: In the games, average movement speed and faster attack speed than Don, but defensively weaker than Leo.
  • Screams Like a Little Girl: 4Kids and 2012 series.
  • Secret Identity: Turtle Titan (4Kids cartoon).
  • The Slacker: 4Kids series.
  • Spell My Name with an S: Many incarnations misspelled the name as Michaelangelo. (which fit as in some languages it is a variation on Michael Angel)
  • Surfer Dude: Mostly in the Fred Wolf cartoon, although aspects of this remain in other incarnations.
  • Took a Level in Dumbass: In the 2012 series.
  • Took a Level in Jerkass: In the Next Mutation series. To a lesser extent, in the 4Kids series as well.
  • Trademark Favorite Food: Though pizza is the favorite food of all four turtles, Michelangelo eats it more obsessively than the other three, especially in the Fred Wolf cartoon. He was the first to try it in the new show.
  • Weapon of Choice: Fighting with Chucks (the hardest to master of the four turtles' weapons).

Splinter

Taught them to be ninja teens. A mutated rat who serves as the turtles' mentor and father, raising them from when they were young.
Appears in: All incarnations.

    Allies 

April O'Neil

A girl next door who serves as one of the turtles' first human friends. Normally associated with the color yellow.
Appears in: Most incarnations.

Casey Jones

An eccentric vigilante who fights crime with various sporting tools (baseball bats, hockey sticks, etc.) Tends to have the most in common with Raphael.
Appears in: Most incarnations.

Leatherhead

A mutant alligator/crocodile (depending on the incarnation) who fights, then befriends the turtles. Generally the subject of a lot of abuse.
Appears in: Most incarnations.

Professor Honeycutt/The Fugitoid

A scientist whose mind was accidentally transferred into a robot's body, and is forced on the run by groups who would use his inventions for their own purposes.
Appears in: Mirage comics, 4Kids cartoon, IDW Comics.

Renet

An apprentice "Timestress" whose job it is to oversee and protect the timestream.
Appears in: Mirage comics, 4Kids cartoon

  • Character Development: (Mirage) Initially a ditzy, irresponsible and overly impulsive girl, she eventually evolves into a mature, responsible and self-reliant woman — after having spent some time as grim-faced, solemn and reluctant. What makes it confusing is that, thanks to her traveling back and forth through time, we don't necessarily see this development in chronological order.
    • In fact, we're informed that her parents originally made her take the job as an apprentice timestress in the hope that she would undergo some much-needed Character Development.
  • Deus ex Machina: In the Mirage comic Juliet's Revenge the fully-adult, post-Character Development Renet plays this role (having changed so much that the Turtles don't recognize her at first). For the most part, however, she averts this.
  • The Ditz: In her pre-Character Development appearances.
  • Dumb Blonde: Again, pre-Character Development she's the embodiment of this trope.
  • Forgotten Phlebotinum: She's completely and inexplicably absent from the Fast Forward season of the 4Kids cartoon, where the Turtles are stuck in the future — because if she'd appeared she could instantly have fixed their predicament.
  • Ms. Fanservice: (Mirage) About the only thing that stays consistent about her appearance is her huge breasts and tendency to wear skintight (and sometimes rather revealing) clothes.
  • Most Common Superpower: It's especially prominent in the Mirage comic (especially if Jim Lawson is drawing her), but the 4Kids cartoon version is notably endowed as well.
  • Shout-Out: The third movie prominently features a time travel scepter that looks very similar to Renet's.
  • Time Police
  • Took a Level in Badass: (Mirage) It's a long way from the Distressed Damsel we're first introduced to, to the nearly god-like woman who shows up to save the Turtles from certain death.

Mondo Gecko

A skateborading gecko who is friends with Michaelangelo
Appears in: Fred Wolf Cartoon, Archie Comics

    Villains 

Oroku Saki/The Shredder

A Ninja Master with ties to the New York underworld, and the franchise's most visible villain.
Note: While all Oroku Sakis are Shredders, not all Shredders are Oroku Sakis.
Appears in: All incarnations.

  • Arch-Nemesis
  • Adaptational Villainy: The 4Kids version is far more malicious than any other versions. The Nickelodeon version is also a nasty piece of work.
  • Ascended Extra / Breakout Villain: In the very first comic, he perishes. In all other media (save Next Mutation, the 3rd and 4th Movie, and seasons 9 and 10 of the Fred Wolf show), he's the main nasty.
  • Authority Equals Ass Kicking: As many entries here show, he's tough enough to prove why the Foot have him as leader.
  • Back from the Dead: Mirage comics, 2nd movie, 4Kids cartoon, IDW comics.
  • Badass: Depending exactly how much according to the incarnation, but he usually is at least able to handle all the Turtles of his own in a fight.
    • Adaptational Badass: The movie, 4Kids and Nickelodeon versions are far more capable and dangerous than the Mirage or Fred Wolf versions of the character.
    • Badass Normal: With the exception of the Utrom and Tengu Shredders in the 4Kids cartoon, all versions of the Shredder are perfectly normal humans, yet remarkable fighters.
  • Bad Boss
  • Big Bad
    • Big Bad Duumvirate: With Krang in the Fred Wolf cartoon.
    • Big Bad Ensemble: So far sharing this with the Kraangs in Nickelodeon version, as both of them have served as the main reacurring threats and both playing a part in the turtles' origin.
    • Bigger Bad: Mirage, posthumously
    • The Dragon: To Karai in the Mirage version not that it would have stopped her from using the title of Shredder herself in the Image Comics' non-canon volume of the Mirage version if Mirage Studios deemed that volume Canon and followed up on it.
  • Blade Below the Shoulder: His trademark weapon.
  • Catch Phrase: 4Kids cartoon: "None of you will leave here/this place alive!"
  • Chuck Cunningham Syndrome: He is not even mentioned in the third film.
  • Composite Character: In the first movie and the Nickelodeon cartoon, it is Saki himself who fights Yoshi over the love of Tang Shen, as opposed to his brother Nagi.
    • In the 4Kids cartoon, he's a hybrid of his usual self and Krang.
  • Corrupt Corporate Executive: 4Kids cartoon.
    • Briefly in the Fred Wolf cartoon, as chairman of Octopus Inc.
  • Darth Vader Clone
  • Dead Person Impersonation: 4Kids cartoon.
  • Demoted to Extra: In Next Mutation, the third and fourth movies, most of the later issues of the Archie Comics, and the ninth and tenth seasons of the Fred Wolf animated series.
  • The Dreaded: (4Kids Version) Even after defeating him several times, just hearing that Ch'rell is involved in something is enough to make the turtles nervous about their chances of survival.
    • The Nickelodeon version seems to be on his way to be this as well. Splinter had a nightmare of him slaughtering the turtles.
  • Evil Is Hammy
  • Evil Laugh
  • Evil Overlord: Tengu, 4Kids cartoon.
    • The Utrom Shredder was one in an alternate Bad Future. Even before that there was an episode in the 1987 cartoon with the same premise of Shredder being ruler of the world in a Bad Future, however, due to the decay he suffered in that version, he was more inept than evil on that occasion and even wanted to go to a world where he wasn't ruler.
      • In the real world in the Fred Wolf cartoon, however, he seemed to be quite competent as the chairman of a large corporation (Octopus Inc) which he took over, and had some success.
  • Evil vs. Evil: In The 4Kids cartoon The Utrom Shredder went up against The Tengu Shredder also in the beginning of the final season when The Turtles are traveling through time they come across a battle between The Utrom Shredder, The Cyber Shredder, and The Tengu Shredder. And in Turtles Forever The 1987 Shredder and Krang team up with The Turtles and Karai to take down Ch'rell The Utrom Shredder
  • Flunky Boss: The 2003 version almost always has some goons the Turtles have to fight through first before engaging him. In fact, almost every fight with him on his terms has him either using Foot ninjas to wear down the enemy before he arrives, or to distract them so he can launch surprise attacks.
  • Genre Savvy: 4Kids cartoon. Doesn't automatically assume the turtles are dead when Never Found the Body occurs, unless he has definitive proof of it. Refuses to believe a robot masquerading as Splinter will fool anyone for a second. Will put aside his personal grudge for the turtles to work alternate angles in his schemes from time to time, unless they REALLY irritate him. What prevents him from being Dangerously Genre Savvy is that he fails to recognize that both his daughter's increasing conflicting loyalties and pulling a You Have Failed Me on minions, (the same minions mind you), will eventually come back to bite you in the ass. Lastly, as Leonardo put it; "The one constant in the multiverse is the Shredder's big fat ego."
  • Healing Factor: 4Kids cartoon.
  • Hoist by His Own Petard: Mirage comics, Turtles Forever.
  • Invincible Villain: In every version, the Shredder is intially too much for the turtles to handle, leaving Splinter to save the day.
    • The Tengu Shredder in the 4Kids version took this to absurd levels. He can fire dark energy out of his hands, warp reality, materialize weapons out of thin air, heal himself, and transform into a dragon. Even before he turned to a life of evil, his martial arts skills were unmatched and during his first defeat, he could only be locked in a sarcophagus rather than being killed since his dark powers were too strong. On top of all that the only person who could severely weaken him to give the turtles a fighting chance was Yoshi, someone who was already dead.
  • Killed Off for Real: Mirage, all incarnations in 4Kids (except Karai)
  • Knight of Cerebus: In all adaptions except the Fred Wolf series (while still a potential threat and skilled at martial arts, he was just as silly as everyone else) and Mirage comic (which was already pretty dark).
  • Large Ham: Just about every incarnation of the character is.
    • In the Fred Wolf animated series, he is especially hammy in episodes where he is voiced by Dorian Harewood.
  • Laughably Evil: Fred Wolf cartoon.
  • Left for Dead: A lot (4Kids series), bordering on Joker Immunity. The turtles even lampshade that he never seemed to die.
  • Legacy Character: Several characters end up taking the identity.
  • Leitmotif: 4Kids cartoon.
  • Mobile-Suit Human: 4Kids cartoon.
  • Mind over Matter: 4Kids cartoon.
  • Multi Layer Facade: In The 4Kids cartoon, he's got a public identity which is Oroku Saki, the rich and well respected Japanese Businessman. Then he's rhe Shredder, a warlord who is using his public persona to gain power. And then his true identity originally only known by his adoptive daughter Karai is Ch'rell, an Utrom criminal who has been on Earth for over a millenium.
  • Not Quite Dead: 4Kids cartoon.
  • Omnicidal Maniac: Turtles Forever, where he's willing to destroy the entire multiverse, including himself, if it meant killing all existing ninja turtles. That includes his own daughter.
  • One-Winged Angel: Super Shredder in the movies and video games during the Fred Wolf cartoon era.Utrom Shredder simply has enlarged exo-suits, and the one he had in Turtles Forever could turn into a giant, Demon Shredder can turn into a dragon. In the two-episode anime loosely based on the Fred Wolf cartoon, the Shredder was also able to use the Dark Mutastone to transform into the dragon-like Devil Shredder and the much larger Dark Devil Shredder in the first episode, as well as one of the Mirror Mutastones in the second episode to become Metal Shredder.
  • Pet the Dog:
    • 4Kids cartoon. Overlaps with Papa Wolf, surprisingly. He seems to hold genuine concern for his adoptive daughter Karai. Until she refused to let him kill the Turtles.
    • In at least the 4Kids and Nickolodeon series, despite his track record for severely punishing failure Shredder often turns a blind eye to Karai's outright defying his orders, at most making empty threats about how she better not do it again.
  • Physical God: Demon Shredder in the 4Kids cartoon.
  • Pragmatic Villainy: Nick cartoon. Despite Baxter Stockman's Mousers losing them a chance at finding the turtle's lair, Shredder thinks killing him would be wasting his talents he could use.
  • Put on a Bus: Fred Wolf and 4Kids cartoons (Utrom).
  • Red Eyes, Take Warning: 4Kids cartoon.
  • Really 700 Years Old: 4Kids cartoon (due to being an alien), IDW comics (due to alien ooze and magic).
  • Reincarnation: In the IDW comics, Oroku Saki is the reincarnation of the founder of the Foot Clan, Tatsuo Takeshi.
  • Secret Identity
  • Shoulders of Doom
  • Spikes of Villainy
  • Super Strength: 4Kids cartoon.
  • Take Over the World
  • Tin Tyrant: 4Kids cartoon. While a few other incarnations come close (such as in the movies and the Nick cartoon), the armor and attitude of that one fit the trope better.
  • Touched by Vorlons: 4Kids cartoon.
  • Villain with Good Publicity: 4Kids cartoon.
  • We Used to Be Friends: Wolf and Nick cartoon, with Yoshi/Splinter.

Karai

A high-ranking member of the Foot Clan(in Mirage comics she's the leader of the Foot).
Appears in: Mirage comics, Volume 3, 4Kids cartoon, 2007 animated film, Nick cartoon.

  • Action Girl: Can usually take any one of the turtles head to head, though not all four like Shredder frequently can.
  • Ambiguously Evil: How ambiguously exactly varies with the versions, but she typically is this in all versions.
  • Anime Hair: The Nickeldeon version; she has black hair in the front and blonde hair in the back.
  • Anti-Villainess: Rarely holds any enmity towards the turtles, fighting them on Shredder's orders.
  • Avenging the Villain: Her motivation for fighting the Turtles in the 4Kids cartoon after they defeated Shredder.
  • Broken Bird: In seasons 4 and 5 of the 4Kids 'toon.
  • Co Dragon: After her introduction, she shares the role of The Dragon with Hun.
  • Corrupt Corporate Executive: 4Kids 'toon.
  • Daddy's Little Villain: In the 4Kids 'toon and Nickelodeon show, she actually is the Shredder's foster daughter.
  • Deadpan Snarker: While the comic and 4Kids' incarnations of the character are mostly serious and stoic, the Nickelodeon version is much more inclined to taunt and snark, even in front of Shredder.
    Shredder: I heard you had the occasion to slay Leonardo, but let him go.
    Karai: That's not true. He escaped.
    Shredder: I find that hard to believe.
    Karai (grinning): He escaped from you, didn't he?
  • Dragon Ascendant: 4Kids cartoon.
  • Enigmatic Minion: 4Kids cartoon, 2007 movie.
  • Foil: A Shadow Archetype to Leonardo.
  • Heel-Face Turn: 4Kids cartoon, though it doesn't happens until season 5.
  • Honor Before Reason
  • It Amused Me: The Nickelodeon version of the character doesn't really seems to care whether what she does is right or wrong, and is mostly concerned about finding entertainment. That includes fighting with Leo but letting him leave and trying to steal a sword from a collector.
  • Lady of War
  • Leitmotif: 4Kids cartoon.
  • My Master, Right or Wrong: 4Kids cartoon.
  • Red Eyes, Take Warning: 4Kids cartoon.
  • Secret Identity
  • Shoulders of Doom: 4Kids cartoon, as Shredder.
  • Spikes Of Doom: 4Kids cartoon, as Shredder.
  • Tin Tyrant: 4Kids cartoon, when she takes over the Shredder's mantle.
  • Tykebomb: 4Kids cartoon, Nickelodeon show.
  • Undying Loyalty: This is, in the 4Kids Cartoon, what prevents her to make a Heel-Face Turn for most of the series; She genuinely respects the Turtles, almost has a friendship with Leonardo and knows to some extent that the Shredder's motives aren't exactly pure, but due to the role he played in her life, she feels like she owes him, and stays by his side no matter what. Even when he actually is defeated, she ends up blaming the turtles for it and going on a Roaring Rampage of Revenge against them. Eventually, it takes the Shredder trying to destroy the Universe (him included) to make her leave him once and for all.
  • The Vamp: In the Nickeldeon Cartoon, she has shades of this toward Leo.
  • Villainess with Good Publicity: 4Kids cartoon.
  • Wild Card
  • Woman Behind the Man: In the Mirage Comics version she's this to the Shredder due to being the leader of the Foot.
  • Worthy Opponent: To the Turtles in general, but typically to Leo.
  • Younger and Hipper: Seems to get younger in each adaptation. In the Mirage comics, she was old enough to have a teenage daughter. In the 4Kids, she appears to be a young adult; and the Nick shows, she's a a teenager the same age than the Turtles.

Baxter Stockman

Mad scientist and creator of the mouser robots. Never quite seems to remain whole (or even human, in some versions).
Appears in: Most incarnations.
  • An Arm and a Leg: ...and an eye, and another arm and another leg and so forth...until he's reduced to a talking head in the 4Kids version.
  • Animorphism: His Fred Wolf 'toon incarnation eventually gets turned into a fly.
  • Anti-Villain: Eventually, in the 4Kids cartoon. He started out as one in the Fred Wolf cartoon but went crazy when he became a fly.
  • Attention Deficit... Ooh, Shiny!: In the Fred Wolf cartoon, in his later episodes he would sometimes suffer from this due to having the mind and attention span of a fly.
  • Back from the Dead: 4Kids cartoon.
  • Black and Nerdy: Except in the 80's cartoon.
  • Body Horror: In 4Kids' "Insane in the Membrane," after four seasons of losing body parts, Baxter Stockman finally obtains a new body via cloning. Soon enough, however, he discovers that it's unstable, as his limbs start deteriorating and melting off. His mind had gone with it before being retrieved and placed back in his jar.
    • His fly-man form from the Fred Wolf cartoon isn't exactly pretty, either.
  • Butt Monkey: Gradually in both the Fred Wolf and 4Kids cartoons. The Nickelodeon cartoon does this right off the bat.
  • Brain in a Jar: Mirage comics, 4Kids cartoon.
  • Clone Degeneration: 4Kids cartoon.
  • The Dragon: He was briefly this to the Shredder in the Fred Wolf cartoon, prior to his transformation.
  • Evil Is Hammy: Especially in the comics, where he's his own scheming villain, but even in the cartoons he's often prone to giddy gloating even when nobody is listening.
  • Evil Mentor: For April in the 4Kids cartoon.
  • For the Evulz: His original motivation in the comics.
  • Four Eyes, Zero Soul
  • Hoist by His Own Petard (4Kids cartoon): In "Return to New York".
  • Horrible Judge of Character: In the Fred Wolf cartoon, he agrees to help Shredder even though he approaches him on the streets in his full villainous garb and it gets worse from there. Even when Baxter turns into a fly as a result of Shredder sending him to Dimension X, as all it takes for Baxter to change from wanting revenge on Shredder to wanting revenge on the turtles is Shredder telling him that it was the turtles' fault.
  • I Just Want to Be Normal: His motivation in both cartoons. Ironically in the 4Kids cartoon he actually does eventually get his body back while in the Lighter and Softer series, he ends up trapped forever in dimensional limbo.
  • Implacable Man: In the 2003 version at least; Lampshaded by Leonardo and Shredder:
    Leonardo: What do we have to do, to stop this guy?
    Shredder: I have asked myself that question many times.
  • Irony: Interestingly, in the original TV Show, he ended up getting a Fate Worse than Death, in a Lighter and Softer show, while in the darker show, not really mattering since Fast Forward still had Dark elements, Baxter gets a somewhat happier ending.
  • Killed Off for Real: Mirage series.
  • Leitmotif: 4Kids cartoon.
  • Mad Scientist
  • Metamorphosis: From human to giant fly, in the Fred Wolf cartoon.
  • Not-So-Harmless Villain: In the Nick cartoon, he treads the line between this and Ineffectual Sympathetic Villain.
  • Omnidisciplinary Scientist: His primary field is usually robotics, evidenced by his famous Mousers, but he'll show expertise in everything from genetics to archaeology as suits the plot.
  • Race Lift: Fred Wolf cartoon.
  • Scars Are Forever: 4Kids cartoon.
  • The Starscream: To the Shredder, in the 4Kids cartoon.
    • He also had shades of this in the Fred Wolf series, using the powers of the Eye of Sarnath for himself in "Curse of the Evil Eye" to get back at Shredder for bullying and abusing him, and later turning on him completely after turning into a fly mutant in "Enter the Fly".
  • Third-Person Person: The 4Kids version is prone to this when gloating.
  • Used to Be a Sweet Kid: In the 4Kids series. He used to be a fairly benevolent and principled scientist too until his ego and arrogance got the better of him.
  • We Can Rebuild Him: Mirage Comics, 4Kids series.
  • Wetware CPU (Mirage Comics, 4Kids series): As loses more and more of his body, Baxter begins becoming this.

Krang

An alien general fighting a losing war, and who turns to Earth for assistance. A small, brain-like creature, he often uses a robotic exoskeleton to move around.
Appears in: Fred Wolf cartoon, Archie comics, IDW Comics, Nick cartoon (as "the Kraang").

  • Big Bad: Along with the Shredder (Fred Wolf series).
  • Bizarre Alien Biology: His brain, having been scooped out of its original skull, can survive perfectly well on its own in the open air and has primitive arms (tentacles), eyes and a fang-filled mouth in its own right.
  • The Cameo: In one episode of the 4Kids cartoon.
  • Canon Foreigner: Began as a creation of the Fred Wolf cartoon, where he merely looked like the Utroms, but has since been used in other series.
  • Dark Lord on Life Support: Krang's android body is a variation. He doesn't need it to survive, just needs it to survive as anything but a barely mobile brain-like creature.
  • Ditto Aliens: They're a race of similar looking aliens, not unlike the Utroms, in the Nickelodeon series (spelled as "Kraang").
    • This is actually a case of Lost in Imitation: the Fred Wolf Krang actually did not look so Utrom-like naturally; his body was destroyed, leaving him a disembodied brain, before he was exiled to Earth. His true form was... well, see Reptiles Are Abhorrent below.
  • Evil Sounds Deep: In the Random House audiotape versions of the Archie Comics series, Krang had a rather deep voice that sounded very similar to that of Dr. Claw's, as opposed to the higher-pitched voice he had in the Fred Wolf cartoon.
  • The Exile: (Fred Wolf Cartoon, Archie Comics) Part of his backstory is that he's an exiled warlord from Dimension X.
  • Expy: of the Utroms and Triceratrons.
  • Fat Bastard: Rides a mech suit resembling one.
  • Genius Cripple: Sure, he's a genius. (His IQ is in the 900s) But as a brain, there's not much he can do on his own. Without his biosuit, he's pretty much helpless.
  • Jerkass / Insufferable Genius: Krang is brilliant, but not easy to work with. He insults and belittles Shredder all the time, and goes out of his way to make things difficult for his allies when he thinks he can get away with it. For example, in (Fred Wolf Cartoon) 'The Return Of The Shredder' while he allows Shredder to return to New York, but denies him any tech or help, forcing Shredder to work on his own. Then there's his reasons for preventing Bebop and Rocksteady to return as well;
    "Because, I enjoy watching people and animals suffer! And you two are both!"
  • Laughably Evil: In the original cartoon and Archie comics.
  • Mark of Shame: (Fred Wolf Cartoon) He was reduced to his brain-like state by the people who exiled him, and he is quite embarrassed about it.
  • Put on a Bus: Fred Wolf series, Archie Comics.
  • Reptiles Are Abhorrent: In the Fred Wolf cartoon, the episode "Invasion of the Krangezoids" shows us what Krang originally looked like — essentially a vaguely anthropomorphic Tyrannosaurus Rex with an overlarge cranium.
  • Spell My Name with an S: The namesake race in the Nickelodeon series spell the name as "Kraang" rather than "Krang".
  • Starter Villain: Nick cartoon.

The Rat King

A man dressed up in rags and bandages who shares a rapport with rats. Varies wildly within incarnations—descriptions for each can be seen in the other Wiki.
Appears in: Mirage comics, Fred Wolf cartoon, Archie comics, 4Kids cartoon, Nick cartoon.

  • Ascended Extra: He was a Monster of the Week who died in his first appearance. Didn't stop him from becoming one of the turtles' most prominent adversaries.
  • Ax-Crazy: During his debut in both the Mirage comics and 4Kids series.
  • Badass Longcoat: Wears one during his single appearance in the Red Sky seasons, "Wrath of the Rat King".
  • Bandaged Face
  • Beast Man: Mirage Comics, 4Kids series.
  • The Beastmaster
  • Clone Degeneration: 4Kids series.
  • Cyborg: 4Kids series.
  • Dead All Along: During the "City at War" arc (Mirage series).
  • Depending on the Artist
  • Healing Factor: As The Slayer (4Kids series).
  • Invisibility: As The Slayer (4Kids series).
  • Karma Houdini: In the Fred Wolf cartoon, though subverted in "Leatherhead Meets the Rat King" when he ends up trapped in a cave-in, as well as in his last appearance where he is finally captured by the Turtles, and also episodes where he plays a neutral role, since he isn't really doing anything wrong then.
  • Killed Off for Real: Mirage
  • Magic Music: In the Fred Wolf series, where he used a flute to control rats.
  • Mind Control: Over rats, in the Fred Wolf series, Archie series.
    • His 2012 version does this in a more creepy fashion even performing a Mind Rape on Splinter
  • Mix-and-Match Man: 4Kids series.
  • Super Soldier: His Slayer persona was designed to be one (4Kids series).
  • Super Strength
  • Those Two Bad Guys: In some of his appearances in the Fred Wolf cartoon, he teamed up with Leatherhead.
  • Villain Exit Stage Left: In the Fred Wolf cartoons, he would often escape after the Turtles defeated him, and it was not uncommon for him to bail out in episodes where he teamed up with other villains. Averted in "Leatherhead Meets the Rat King" and "Wrath of the Rat King".

Bebop and Rocksteady

Human gang members who were mutated into a warthog and rhino respectively, and serve as henchmen to the Shredder. Neither of them are particularly bright.
Appear in: Fred Wolf cartoon, Archie comics, IDW Comics.

  • Adaptational Badass: While still idiots, the IDW incarnations of Bebop and Rocksteady are noticeably far more dangerous than their 1987 cartoon counterparts.
  • Animorphism
  • Becoming the Mask: In the Archie comics series, the animal part of their natures began taking over more and more. This actually increased their intelligence, while also making them more neutral and less evil.
  • Blondes are Evil/Bald of Evil: Rocksteady had blonde hair in his human form, but he inexplicably went bald after he mutated into a rhino.
  • Canon Foreigners
  • Character Development: The Archie comics series gradually increased their intelligence and made them less evil as their animal natures took over more and more.
  • Cool Shades: Bebop.
  • Dual Boss: In a few of their video game appearances (namely the arcade games), they're fought as a pair.
  • Dumb Muscle
  • Expressive Mask: Bebop's sunglasses were sometimes depicted in this manner, most notably in the Archie comic books.
  • Flanderization: While they weren't exactly geniuses in the first season, they were still extreme physical threats to the turtles, especially in their second appearance after being mutated. From that point on, they became more or less ineffectual against them, and even some humans.
  • Friendly Enemy: In their final appearance in the Archie comics series, they hijack the spaceship used by Krang and his henchmen to reach Earth, using their guns to "convince" the Turtles not to stop them. However, Bebop and Rocksteady cheerfully accept Leonardo's request to take Krang and his goons back to the prison planet they escaped from, before returning to the Eden-like planet they've made their new home.
  • Harmless Villain
  • Laughably Evil
  • Metamorphosis
  • The Millstone: On many occasions Shredder may well have won if not for their bumbling. Of course then there would be no more show. They even end up costing Utrom Shredder an otherwise clear-cut victory in Turtles Forever.
  • Musical Theme Naming
  • Pig Man: Bebop.
  • Put on a Bus: Fred Wolf series, Archie comics.
  • The Quincy Punk
  • Race Lift: In the first issue of the Archie Comics series, Bebop's human form was depicted as Caucasian, though this was corrected in Archie and IDW's reprints of the comic. Bebop's human form was also made Caucasian for his figure in the Mutations toyline.
  • Rhino Rampage: Rocksteady.
  • Salt and Pepper: Rocksteady's human form was Caucasian and Bebop's was African American.
  • Simpleton Voice
  • Team Rocket Wins: Their final appearance in the Archie comics series has them convincing the Turtles not to fight simply by pointing their guns at them.
  • Those Two Bad Guys

Hun

A hulking, tattooed gangster who serves as the leader of the Purple Dragons street gang.
Appears in: Mirage comics, 4Kids cartoon, Dreamwave comics, IDW comics.

Slash

A humanoid turtle with a fondness for palm trees.
Appears in: Fred Wold cartoon, Archie Comics, IDW Comics, Nick cartoon.

Tokka and Rahzar

A snapping turtle (Tokka) and wolf (Rahzar) mutated by the Shredder.
Appears in: Films, Fred wolf cartoon, 4Kids cartoon, Nick cartoon (Rahzar only).

    Others 

Hamato Yoshi

Splinter's owner, a martial artist whose fate at the hands of The Shredder gets the ball rolling. Sometimes he and Splinter are one and the same.
Appears in: All incarnations.

Tang Shen

Yoshi's lover, who is murdered as part of his backstory.
Appears in: Mirage comics, films, 4Kids cartoon, IDW Comics, Nick cartoon.

  • Death by Origin Story
  • Happily Married: Implied in the Nick cartoon to Yoshi, before her death.
  • Love Triangle: Is the object of affection for two suitors in nearly every adaptation. One of the suitors is Hamato Yoshi, and the other suitor is primarily Oroku Saki (though in the Mirage comics it was Saki's brother Nagi, and in the 2003 cartoon it was an entirely different character named Yukio Mashimi, who grew up alongside Yoshi and Tang Shen). She always chooses Yoshi, and the other suitor gets jealous. While there are variations in the story for what happens after that point, the one consistency is that Tang Shen always ends up dead by the end.
  • Missing Mom (IDW Comics): As far as is known, she is the only member of the Hamato family to not have been reincarnated.
  • Posthumous Character
  • Stuffed into the Fridge: Her only purpose in the narrative is to get killed.
  • Yamato Nadeshiko: Most notable in the 4Kids cartoon, where she's allowed to have lines and a semblance of a personality, but she is presumably one in other continuities as well.

Klunk

Michelangelo's pet cat, originally a stray that Mike found and adopted one Christmas.
Appears in: Mirage comics, Image comics, 4Kids cartoon.

  • Gender Flip: Possibly. Is male in the Mirage comic, and is referred to as male when first appearing in the 2003 cartoon — though in redesigns for the Back To The Sewers looks more female, and was even referred to as a "she" on the 4Kids website.
  • Killed Off for Real: Mirage continuity.
  • Someone to Remember Him By: After his death, Mikey adopts one of the kittens Klunk fathered.
  • Team Pet: Curiously enough, subverted. He's a completely normal cat who never gets involved in the stories and whose appearances are generally spent lying around on the floor or in someone's lap.
  • What Happened to the Cat?: When Shredder attacks April's apartment in issue 10, Klunk is nowhere to be seen, and isn't even mentioned when April, Casey and the Turtles escape. (This is doubly frustrating because he was explicitly shown to be in the apartment in the Leonardo special, which takes place immediately before.) He remains unmentioned for several issues before he shows up on Casey's farm with no explanation at all.

Wingnut and Screwloose

An alien bat and mosquito duo from the planet Huanu
Appears in: Archie comics, Fred Wolf cartoon, Nick cartoon (Wingnut only)


The SmurfsCharacterSheets/Multiple MediaTeenage Mutant Ninja Turtles (2012)
Taz-ManiaCharacters/Western AnimationTeenage Mutant Ninja Turtles (1987)

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