Leonardo - "Leo" is a hardworking ninjutsu student, learning how to be an effective leader for his three often unruly brothers. He wears a blue mask and fights with two katana swords called Niten Ryu. He also has a crush on April which his brothers all tease him about.
Donatello - "Donnie" is in charge of the design and manufacture of all of the tools and weapons in the Turtles' arsenal, and he is also a gifted hacker. He wears a purple mask and fights with a rokushakubo which converts to a naginata.
Raphael- "Raph" often lets his impulsiveness get in the way of rational thinking. He wears a red mask and fights with two sai.
Michelangelo - "Mikey" loves video games, skateboarding, pranks and pizza. He wears an orange mask and fights with two nunchakuwhich convert into kusarigama. Though he possesses a child-like innocence, Mikey always brings his best game to a fight.
Splinter - Splinter is the mutant rat leader of the entire family, and serves as a father figure for the Turtles. He once was a pet for a renowned martial artist, Hamato Yoshi in Japan. It was from watching Yoshi that Splinter first learned the art of ninjitsu which he then passes on to the Turtles. Splinter often acts as much as a spiritual guide and counselor to the team as he does their teacher. While he does not wield a traditional Japanese weapon, Splinter carries a cane which he can utilize as a weapon (like a bo staff) with fierce proficiency. Unlike the previous animated series, the Turtles often refer to Splinter as their father, rather than their master.
April O'Neil- The 17-year-old college student who likes to play video games and eat pizza. April befriends the Turtles after the Foot Clan kidnap her. This incarnation of April O'Neil is now a blond with pink eyes and wears a more feminine outfit: a medium and frilly blue skirt, a pink tank top, and a purple vest that she ties around her neck.