This is a list of characters from the 2012 Teenage Mutant Ninja Turtles series. It is an American animated series based on the eponymous characters. It premiered on Nickelodeon in the United States on September 28, 2012. It also premiered on YTV in Canada on September 29, 2012.
Main characters Heroes The Teenage Mutant Ninja Turtles is a team of anthropomorphic red-eared slider turtle mutants who have been hidden ever since their mutations within the sewers of New York City and usually go up to the surface only in the night time.
Leonardo (voiced by Jason Biggs in seasons 1 & 2, Dominic Catrambone for the remainder of season 2 and Seth Green in seasons 3–5) is an enthusiastic ninjutsu student, wears a royal blue mask, and fights with two long swords called Katanas. Leo is the oldest and most mature of the turtles and the second oldest of Splinter's children, he is the fearless leader of the Ninja Turtles. Following Splinter's death, he reluctantly stepped up to the increasingly difficult role of sensei, which added even more pressure onto him. Since the episode "The Deadly Venom", he is the only Ninja Turtle who is capable of using the spiritual, healing abilities of "the healing hands" technique to heal himself and others which enshrouds his body in a white aura by chanting the mantra and the right hand seals. Despite his strong sense of honor and loyalty towards his family and friends, Leo is a perfectionist who places an excessive amount of value in his title as leader, causing him to have something of a superiority complex and make reckless decisions. Nevertheless, he is mature enough to admit when he is in the wrong and fights to protect the city and his loved ones. Raphael (voiced by Sean Astin) is the physically strongest second eldest of his four brothers who serves as the muscle. He wears a red mask and fights with two sai. Known for his rage, he commonly takes it out on his brothers. He sports a crack at the top of his front shell as a result of Splinter's earlier encounters with the Kraang that were after him. Despite his anger issues and impulsive, overly rebellious nature stemming from them, Raphael openly and strongly loves, supports, and protects his family and allies and is no less conventionally heroic than any of them. Donatello (voiced by Rob Paulsen) is the smartest and second youngest of his four brothers. He is in charge of the design and manufacture of all of the tools and weapons in the Turtles' arsenal. He is also a gifted hacker. He wears a purple mask and fights with a rokushakubo which converts to a naginata via a blade inside one end of the staff. He has a crush on April and a rivalry with Casey because of it. Despite his intelligence, he can be anxious and can at times even get into a rage, but is often the most gentle and ultimately means well. Paulsen had previously voiced Raphael in the 1987 series of the same name. Michelangelo (voiced by Greg Cipes) is the youngest of the family and is a lover of video games, skateboarding, pranks and pizza. He wears an orange mask and fights with two nunchaku which convert into kusarigama via a blade inside of one of the sticks of each nunchaku and extra lengths of chain stored in the other. He loves to prank Donatello and Raphael the most. It is easy to tell that he is the youngest sibling on account of his most childish behaviors, being an immature turtle out of the four. He has an active imagination and he names all the mutated characters. Despite his immaturity, Michelangelo is the most optimistic and kindhearted of the brothers, often bringing a lighter mood to the team's adventures.
Allies Hamato Yoshi / Splinter (voiced by Hoon Lee) is the son and heir of Hamato Yūta, the leader of the Hamato Clan whose rivalry with the Foot Clan came to an end when he was a child, and the adoptive father of the turtles. During a confrontation with the Kraang, Hamato Yoshi was mutated into a mutant brown rat upon coming into contact with a rat before the conflict. Since then ever since alluding to the Kraang, he trained the Turtles in ninjutsu. During the Triceraton invasion, he is killed by Shredder but this attempt is foiled when the turtles travel back in time to save Earth. In the second-to-last episode of Season 4 titled "Requiem", he is again murdered by Super Shredder and buried at the O'Neil farmhouse. His spirit continues to watch over his family, imparting wisdom and advice to Leonardo, who reluctantly takes on the more challenging fatherlike role of sensei on his behalf. April O'Neil (voiced by Mae Whitman) is the plucky, resourceful, determined 16-year-old, daughter of Dr. Kirby O'Neil and the love interest/crush of Donatello. Contrary to her previous incarnations, she possesses extraordinarily strong psionic/extrasensory abilities; having been born a human/Kraang mutant hybrid, as a byproduct of her late mother being experimented on by the Kraang before she was born, which she gradually learns to develop further and increase considerably in strength as the show progresses; particularly in Season 4 and Season 5. Her psionic aura varies from being transparent, to white, to yellow. Since "Tale of Tiger Claw" her psychic and extrasensory powers have been greatly reduced, as she no longer can draw more strength from the mystical Sol Star necklace she had destroyed, but they are still far stronger than they were before she acquired the Aeons mystical gift. Her ninja weaponry is a Tessen and, later, a dragon tanto. She proves capable of such compassion for animals and also sees cyborgs as people for their personalities instead of bodies as shown by Professor Honeycutt. Donatello and Casey both have a crush on her and she has shown hints of feeling the same towards them too. Hamato Miwa / Karai (voiced by Kelly Hu) was the only 16-year-old human child, until mutated, and willful daughter of Hamato Yoshi (Splinter) and the late Tang Shen, who was taken away from Splinter by Oroku Saki when she was just an infant and renamed Karai. She is the oldest and only biological child of Master Splinter. Initially, she was their sworn enemy, but soon became a trusted ally after learning the truth about her parents and grew even closer to Leonardo, who had liked her since they first met. Karai was later accidentally mutated into a violet-and-white horned viper by Shredder where an extra chemical ingredient that Baxter Stockman accidentally got into the horned viper DNA enabled her to shift back and forth and assume hybrid forms. She had grown to ally herself with her adoptive brothers the Turtles, her true father Splinter, April, Casey and their allies. She is one-eighth Chinese through her maternal great-grandfather. Casey Jones (voiced by Josh PeckComic-Con: Nickelodeon Sets 'Legend of Korra,' 'Ninja Turtles' Panels (Exclusive) Hollywood Reporter, Retrieved July 13, 2013) is the teenage son of a former NHL player at April's school who April is hired to tutor for an extra credit assignment. He later became an ally of the Turtles. He has a crush on April (later friends with her) and a rivalry with Donatello because of it. He's prone to recklessness but means well. He is a close brotherly figure to Raph due to both sharing an eagerness to fight. The Mighty Mutanimals is a team of mutant animals that debut in "Battle for New York, Part One". They were brought together by Jack J. Kurtzman to fight the Kraang. Slash (voiced by Corey Feldman) was Raph's pet ornate box turtle when he was originally named Spike. In the second season, Spike transformed into a mutant after jumping into a spilled mutagen then renamed himself "Slash" in "Slash and Destroy". He is the leader of the Mutanimals. In this version, Slash wields a mace. Feldman had previously voiced Donatello in the 1990 live-action film and its second sequel. Leatherhead (voiced by Peter Lurie) is a sewer alligator that was mutated by the Kraang after the parents of his owner flushed him down the toilet. He was first introduced in "It Came from the Depths" in season one. He is Slash's second-in-command and is best friends with Mikey. Pigeon Pete (voiced by A. J. Buckley) is a common pigeon that was mutated by the Kraang and has a fondness for sourdough. Pigeon Pete is the team's spy. He was later replaced by Mondo Gecko. Jason / Mondo Gecko (voiced by Robbie Rist) was a popular high school skateboarder who while skating was hit on the head by a canister of mutagen that was accidentally dropped from the sky by the Turtles. He mutated into a mutant common leopard gecko due to his pet common leopard gecko being on his shoulder at the time. Rist previously voiced Michelangelo in the live-action film trilogy from 1990. Dr. Tyler Rockwell / Monkey Brains (vocal effects provided by Frank Welker in "Monkey Brains", speaking voice provided by Tom Kenny since "Battle for New York, Part 1") is a neuroscientist who was mutated into a mutant chimpanzee by Dr. Victor Falco. He eventually was again experimented on where he regained his power of speech and gained psionic abilities of telepathy and telekinesis, similar to April's. He is the brains of the Mighty Mutanimals. Chompy Picasso (vocal effects provided by Dee Bradley Baker) is an alien turtle and the child of Tokka who has become Raphael's pet turtle since Season 4. Like his mother, Chompy can breathe fire. In an alternate future dominated by mutant animals, Chompy Picasso has grown up to be bigger than Raphael enough so for anyone to ride on. Timothy / Pulverizer / Mutagen Man (voiced by Roger Craig Smith) was an ineffective teenage ice cream truck vendor who fights crime as the Pulverizer after witnessing the Turtles' first battle with Baxter Stockman. He later consumed mutagen in hopes of becoming like the Turtles; however, due to not coming into any contact with any animal or plant, Timothy dissolved into a mutagen-drinking blob called Mutagen Man, but also becoming savage. Jack J. Kurtzman (voiced by Robert Forster) is a private investigator and journalist investigating the Kraang and their activities on Earth. He debuted in the Season 2 episode "The Kraang Conspiracy", and was the one who revealed April's mysterious childhood past and unique origins to her and the Turtles. Kurtzman also brought the Mighty Mutanimals together during the threat of the Kraang. Ice Cream Kitty (vocal effects provided by Kevin Eastman) is a stray tabby cat that April found in an alley. Deciding to find it a home, she asked Mikey to raise it as his pet. It mutated into Ice Cream Kitty upon eating Neapolitan Ice Cream that was covered in mutagen. Because of this, Mikey had to keep Ice Cream Kitty as cold as possible. Bigfoot (vocal effects provided by Diedrich Bader) is a cryptid that the Turtles encountered in the woods of Northampton in Upstate New York. Punk Frogs are a group of humanoid mutant American bullfrogs that are the results of mutagen being dumped near their pond during Mikey's fight with Mom-Thing in "Buried Secrets". Attila the Frog (voiced by Maurice LaMarche) is the leader of the Punk Frog. Genghis Frog (voiced by Kevin Michael Richardson) is the militaristic member of the Punk Frogs. Rasputin the Mad Frog (voiced by Maurice LaMarche) is Attila the Frog's right-hand frog. Napoleon Bonafrog (voiced by Jon Heder) is the laid-back member of the Punk Frogs who befriends with Michelangelo. Frog Soldiers (voiced by Rob Paulsen, Josh Peck, and Kevin Michael Richardson) are a group of mutant frogs led by Genghis Frog and later by Napoleon Bonafrog who make up the foot soldiers of the Punk Frogs.