Teenage Mutant Ninja Heroes

Teenage Mutant Ninja Heroes is an AU/reboot version of Teenage Mutant Ninja Turtles. It stars all the characters of the series, including the ones from the TMNT summer short Teenage Mecha Ninja Turtles. This series lasts in 12 seasons.

Teenage Mutant Ninja Heroes/Hamato-Sawyer Clan

 * Leonardo "Leo" Sawyer (voiced by Darren Criss): The Leader of the Ninja Heroes, and second-in-command of the Hamato-Sawyer Clan, born as a red-eared slider. He is 15 years old. He and his turtle brothers are quadruplets (him being the oldest), but he is younger than Basque and Frida, making him the third oldest member of the group. His theme color is blue. Leo is the most mature, disciplined and skilled. Calm, cool, and collected, he always attempts to help his brothers to be the best ninjas they can. Because of his leadership, he's often challenged with the constant rebellion of Jack. An expert swordsman, he wears an ocean blue mask and wields two special katanas with the abilities to open portals or to teleport himself or others.. He has a huge crush on April, who later becomes his love interest/girlfriend.
 * Donatello "Donnie" Sawyer (voiced by Bumper Robinson): The Brains of the Ninja Heroes, born as a spiny softshell turtle. He is 15 years old. He is the second oldest of the Turtle quadruplets, but is the fourth oldest of the group. His theme color is purple. Donnie is the smartest and gentlest of the heroes. An intellectual, he often attempts to find an alternative way of reaching his goals. Donnie is a gifted scientist and mathematician. He does a lot of work with vehicles, technology, and experiments. Any science and math skill you can think of, he will do it all. Using his intellect, he invents gadgets and vehicles. He is typically the passive turtle and Leonardo's second-in-command, playing the part of peacekeeper between Leo, Frida and Jack. Donnie is not as rowdy and violent as his siblings, but he can get a little annoyed with them on occasion. However he never loses his temper. He is calm, sensible, quiet, friendly, and gentle. He does not get into a lot confrontations with his siblings. He is more interested in his work than in his ninjutsu but he still attends to ninja practice and works hard there as well as his projects. Studying the art of Bojutsu, he wears a purple mask and wields a powerful mystic Bō staff with magic energy versions of his gadgets. The new mystic staff could also link up with his technological attachments.
 * Raphael "Raph" Sawyer (voiced by Robbie Daymond): The Brawn of the Ninja Heroes, born as an alligator snapping turtle. He is 15 years old. He is the second youngest of the Turtles, but is the fourth youngest of the group. His theme color is red. Raph is the most temperamental and physically strongest of the turtles. Rebellious, cynical and quick-witted, he is often driven by his strong emotions. His quick temper tends to get the better of him, but he openly loves his siblings, parents, and allies. Unlike other incarnations, he listens to Leo's orders and respects and gets along with his three oldest siblings. Raph is known for his temperamental and cynical personality, being short-tempered, aggressive, sullen, maddened, sarcastic, and rebellious. He wears a red mask and uses a special pair of sai with the abilities to amplify his own physical strength with red mystical energy constructs or to make clones of himself made from the same energy.
 * Michelangelo "Mikey" Sawyer (voiced by Greg Cipes): The Wildcard of the Ninja Heroes, born as an ornate box turtle. He is 15 years old. He is the youngest of the Turtles, but is the third youngest of the group (being older than Jack and Kusama). His theme color is orange. Mikey is the least disciplined and most fun-loving turtle. He is usually portrayed as the most agile and naturally gifted, contrasting his free spirit and inability to take training seriously. He often uses southern Californian surfer dialect and expresses his love of Pizza whenever brought up. Michelangelo is the most naturally gifted of the four brothers but prefers to have a good time rather than train. The youngest and most energetic of the team, he is shown to be rather immature; he is known for his wisecracks, quick-wit, optimism, and love of skateboarding and pizza. He wears an orange mask and fights using a special set of nunchaku with the ability to extend to great length and control will. His new catchphrase is "Booyakabunga!" (a mixture of his two famous catchphrases Booyakasha and Cowabunga). His friendship/bromance with Basque is very similar to the one of Cyborg and Beast Boy from Teen Titans/Teen Titans Go.
 * Frida Franklin (voiced by America Young): The Co-Pilot of the Ninja Heroes, earning the ability to transform into a half viper half turtle hybrid. He is 15 years old (almost 16). She is the (adoptive) older sister of the Turtles, as well as being the second oldest of the group. Her theme color is silver. Before Akari adopted her into the clan, Frida was a hacker that steals copies of video games for herself to earn some extra money since she and her then-decreased mother abandoned her toxic, abusive father. She is based on Frida from Teenage Mecha Ninja Turtles, as well as Venus de Milo, Robin from Teen Titans/Teen Titans Go, and the incarnations of Jennika from the IDW comics, and Raphael from Rise of the TMNT.
 * Jackson "Jack" Reilly (voiced by Eric Artell): The Lone Wolf of the Ninja Heroes, earning the ability to transform into a half tiger half turtle hybrid. He is 14 years old (almost 15). He is the (adoptive) younger brother of the Turtles, as well as being the second youngest of the group. His theme color is green. Before he was adopted by Akari and recruited into the team, Jack was a strict student of the Hamato-Sawyer Clan who wanted to become a powerful ninja, and he is close friends with Cody Jones as of Season Three onward. He is based on Jackson from Teenage Mecha Ninja Turtles, as well as Raven from Teen Titans/Teen Titans Go, Larota, and the incarnation of Leonardo from Rise of the TMNT.
 * Basque Stone (voiced by Khary Payton): The Heart of the Ninja Heroes, earning the ability to transform into a half dragon half turtle hybrid. He is 16 years old. He is the (adoptive) older brother of the Turtles, as well as being the oldest of the group. His theme color is indigo. Basque was a student of Midtown High and a child prodigy who loves technology, math, economics and studying animal DNA before he was adopted into the clan by Akari. He is based on Basque from Teenage Mecha Ninja Turtles, as well as Cyborg from Teen Titans/Teen Titans Go, Talena, and the incarnation of Donatello from Rise of the TMNT.
 * Kusama Lane (voiced by Tania Gunadi): The Ray of Sunshine of the Ninja Heroes. He is 14 years old. She is the (adoptive) younger sister of the Turtles, as well as the youngest of the group. Her theme color is pink. She is the childhood friend of Frida and a famous gamer known as Ninja Gamer before she was adopted by Akari and recruited into the team. She is based on Kusama from Teenage Mecha Ninja Turtles, as well as Artemisia from Secrets of the Ooze, Starfire from Teen Titans/Teen Titans Go, Amoly, and the incarnation of Michelangelo from Rise of the TMNT.
 * Hamato Yoshi/Master Splinter (voiced by Ken Jeong): One of the leaders of the Hamato-Sawyer Clan who is a Japanese man mutated into an anthropomorphic rat. Generally depicted as wise and powerful, he raised the four turtles and four human orphans and trained them in the art of Ninjutsu. He is very cautious and protective of them, constantly warning them of the dangers on the surface.
 * Master Akari Sawyer (voiced by Brenda Song): One of the leaders of the Hamato-Sawyer Clan who is a Chinese woman mutated into an anthropomorphic nine-tailed fox, and Splinter's childhood sweetheart and eventual wife after Tang Shen was killed by Shredder. She is based on Tang Shen, as well as Chung I and Hamato Michelangelo from Teenage Mecha Ninja Turtles.
 * April O'Neil (voiced by Lea Michele): A 15-year-old Caucasian-American teenage girl who is a confident, courageous, benevolent, intelligent, and outgoing human companion of the Ninja Heroes. She was a former lab assistant to the mad scientist Baxter Stockman. She met the Ninja Heroes when they saved her from a squadron of MOUSERS chasing her down the sewers. She embarked on many of the team's adventures and aids them by doing the work in public while the Ninja Heroes cannot. Like in the 2012 series, she is able to possess extraordinary 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. Her psionic aura varies from being transparent, to white, to yellow. However later, her psychic and extrasensory powers have been greatly reduced, as she no longer can draw more strength from the mystical Sol Star necklace she herself 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 is Leo's love interest and later girlfriend in the series.
 * Robyn O'Neil (voiced by Kat Graham): A 16-year-old African-American teenage news reporter for Channel 6 News who is the first human friend and ally of the Ninja Heroes. She is April's older cousin. She was the first one to befriend the Ninja Heroes, and has already known them for 5 years before the beginning of the show and the team looks to her as an older sister figure. Robyn is a smart, friendly, intuitive, fun-loving and virtuous, but somewhat tomboyish, and sometimes unorganized and irresponsible girl with glasses who is constantly looking for a job to support herself which constantly goes wrong. However, despite her enthusiasm and bravado, she has a hard time making friends at school and is nervous about high school gatherings. When fighting, she also wields any blunt weaponry she can find, mostly a baseball bat. She is based on the incarnations of April and Robyn from the 2003 series and the incarnation of April from Rise of the TMNT.
 * Casey Jones (voiced by Josh Peck): The teenage son of a former NHL player at April and Robyn's school who Robyn is hired to tutor for an extra credit assignment. He is also known as a hockey-masked vigilante, armed with an assortment of sporting goods that he carries in a golf bag. He is a close ally and friend of the Ninja Heroes. He has a crush on Buffy and a rivalry with Jack 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.
 * Buffy Shellhammer (voiced by Amanda Leighton): April and Robyn's best friend and classmate from high school.
 * Venus de Milo/Irma Chung (voiced by Kate Micucci): The adoptive daughter of Chung I, and the honorary member of the Ninja Heroes. She is based on Mei Pieh Chi/Venus de Milo from The Next Mutation, and Irma Langenstein from the 2012 series.
 * Cody Jones (voiced by Grant Gustin): The future great-grandson of Casey and Buffy and the heir of the O'Neil Tech. He is the Ninja Heroes' friend and guide from the year 2105.
 * Starlee Hambrath (voiced by Amanda Brown): A bright and highly intelligent alien genius and O'Neil Tech intern from the planet Omatran and a friend of Cody and the Ninja Heroes. She is shown to have a crush on Cody.
 * Hamato Miwa/Karai (voiced by Kelly Hu): The only 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 child of Master Splinter. She is 16 years old. Initially, she was their sworn enemy, but soon became a trusted ally after learning the truth about her parents and grew even closer to Jack, who had a crush on her when they met. Karai later mutated into a violet-and-white viper where an extra chemical ingredient enabled her to shift back and forth and assume hybrid forms. She had grown to ally herself with her adoptive siblings; the Ninja Heroes, her true parents; Splinter and Akari, April, Robyn, Casey, Buffy and their allies. She is one-eighth Chinese through her maternal great-grandfather. She is based on Karai from the 2012 series.

Villains/Foot Clan

 * Shredder/Otoku Saki (voiced by ): The main antagonist of the series, and leader of the Foot Clan.
 * Kraang (voiced by Mark Hamill): The other main antagonist of the series.

Trivia

 * This series shares some elements and inspirations from the 2003 series, the 2012 series, and the Rise of the Teenage Mutant Ninja Turtles series, as well as the TMNT summer shorts (especially Teenage Mecha Ninja Turtles).
 * In this series, Frida, Jackson, Basque and Kusama are half human half mutant with special mutant superpowers. They also have different theme colors, and slightly different personalities.
 * April's older sister Robyn was remade as her cousin.