Splinter is the wise, mutated rat sensei and adoptive father of the Teenage Mutant Ninja Turtles, who trains them in ninjutsu and martial arts. His origin varies by iteration, sometimes being the pet rat of ninja master Hamato Yoshi who mimics his training, and other times being Hamato Yoshi himself, mutated into a rat. He serves as the Turtles' mentor, guide, and father figure, teaching them discipline, honor, and how to fight their enemies, particularly the Shredder.

Leonardo is the oldest brother, highly disciplined student of Master Splinter, and the dedicated leader of the team. Wielding twin katana and wearing a signature blue mask

Raphael is the fierce, muscular "muscle" of the team, instantly recognizable by his vibrant green skin, a ragged red bandana, and a distinct lightning-bolt-shaped crack on his chest shell Is a hot headand sarcastic, preferring to punch his way out of problems rather than plan ahead. Despite his aggressive nature and constant bickering with his rival brother Leonardo, Raph possesses a deeply loyal heart, acting as an fierce protector to Donatello and Michelangelo. Armed with his signature twin sai, he is a brutal close-quarters brawler who hides hidden vulnerabilities, including a severe fear of cockroaches

Donatello is the team's brilliant, tech-savvy inventor, standing out as the tallest and leanest of the brothers with a gap-toothed smile and a purple bandana is a master of engineering and chemistry, responsible for creating the turtles' entire arsenal While he uses a custom bo staff equipped with a hidden naginata blade in combat, has a crush on April O'Neil, Donnie is deeply awkward, highly emotional

high-energy, pizza-loving "heart", freckles, bright blue eyes, and orange bandana he is the youngest brother a goofy who loves video games, comic books, and naming their mutated villains. While his short attention span and childish antics often annoy his brothers and unpredictable combatant who wields dual nunchucks that can convert into kusarigama chains

April O'Neil is a news reporter, red hair in a ponytail, a yellow-and-white t-shirt After her scientist father is abducted by the alien Kraang, she forms an unbreakable bond with the turtles, who take her in and help her train under Master Splinter to become a formidable kunoichi (female ninja). Wielding a signature wooden tessen (war fan) and a tanto blade, she is far more than an ordinary human friend; due to dark Kraang experimentation on her ancestry, April possesses powerful psychic abilities like telepathy, telekinesis, and a sixth-sense connection to universal vibrations life is complicated by a long-running, awkward love triangle between the devoted Donatello and the hotheaded Casey Jones

hockey-playing high school student turned reckless street vigilante who fights crime alongside the turtles skull-faced goalie mask, his signature sleeveless hoodie, and a sports bag packed with improvised weapons like hockey sticks, baseball bats, and customized stun gloves. Driven by a desire to protect New York City after his father was targeted by local thugs, shares an instant, hotheaded brotherhood with Raphael and competes with Donatello for the affections of April O'Neil, Casey is a fiercely loyal ally

she is actually Master Splinter's biological daughter, Miwa, raised under a web of lies by the Shredder. Voiced by Kelly Hu, she stands out with her rebellious streak, sharp wit, and distinct asymmetrical haircut, evolving from a dangerous Foot Clan leader into a tragic hero and vital ally to the turtles.

is a ruthless, fiercely intimidating leader of the Foot Clan and the ultimate archenemy of the turtles and Master Splinter he is a towering, heavily armored warlord driven entirely by an obsessive, multi-decade thirst for vengeance against his former brother-in-arms, Hamato Yoshi. His standard Kuro Kabuto helmet and razor-sharp, forearm-mounted kuro kabuto blades make him a visual nightmare, Splinter's biological daughter, Karai, as his own weapon against Master Splinter. forming a dangerous alliance with the alien Kraang

hive-mind species of brain-like alien conquerors from Dimension X who serve as the primary overarching villains these pink, tentacled creatures are completely identical and lack individual personalities, communicating in a highly robotic, grammatically repetitive, and circular manner that frequently uses phrases like "the place which is known as." To blend into Earth society, they pilot mechanical, emotionless robotic exo-suits disguised as identical, blonde-haired human businessmen in grey suits. Driven by a desire to terraform Earth into a mutagen-covered wasteland suitable for their survival, they are responsible for bringing mutagen to New York City, abducting April O'Neil's father, and launching massive technological invasions