It is a story about 4 teenage mutant turtle brothers that lives in the sewer together with a mutant ninja rat that raised and trained them to be a ninja.
Turtles
Raphael
The team's bad boy, Raphael wears a red mask and wields a pair of sai. He is physically very strong, has an aggressive nature, and seldom hesitates to throw the first punch. He is often depicted with a very pronounced New York accent. His personality can be fierce and sarcastic, and oftentimes delivers deadpan humor. He is intensely loyal to his brothers and sensei. He is named after the Italian painter and architect of the High Renaissance, Raphael.
Michaelangelo
The most stereotypical teenager of the team, Michelangelo is a free-spirited, relaxed, and often goofy jokester, and known for his love of pizza. Michelangelo wears an orange mask and wields a pair of nunchucks. He provides the comic relief, though he still has an adventurous side. The least mature of the four Turtles, he shows characteristics of a "surfer" type and is often depicted with a Southern Californian accent. He is named after the Italian Renaissance painter, sculptor, architect, poet, and engineer, Michelangelo.
Leonardo
The tactical, courageous leader and devoted student of his sensei, Leonardo wears a blue mask and wields two katana. As the most conscientious of the four, he often bears the burden of responsibility for his brothers, which commonly leads to conflict with Raphael. Leonardo was named after the Italian polymath, painter, engineer, inventor, writer, anatomist, and sculptor, Leonardo da Vinci.
Donatello
The scientist, inventor, engineer, and technological genius, Donatello wears a purple mask and wields a bo staff. Donatello is perhaps the least violent turtle, preferring to use his knowledge to solve conflicts, but never hesitates to defend his brothers. He is named after the early Renaissance Italian artist and sculptor from Florence, Donatello.
The Teenage Mutant Ninja Turtles are four fictional teenaged anthropomorphic turtles named after Renaissance Italian artists. They were trained by their anthropomorphic rat sensei in the art of ninjutsu. From their home in sewers of New York City, they battle petty criminals, evil overlords, mutated creatures, and alien invaders while attempting to remain hidden from society.
The turtles face a new challenge when Shredder escapes from custody and joins forces with Baxter Stockman, a mad scientist who plans to use a serum to take over the world. Along for the ride are Bebop and Rocksteady, two dimwitted henchmen who provide plenty of muscle.
Shredder
A villainous ninjutsu master called Oroku Saki, he is the leader of the Foot Clan, an evil ninja clan. He has been the archenemy of Splinter and the Turtles. The Shredder prefers to use his armor instead of weapons.
Luckily, the turtles have their own allies in April O'Neil, Vernon Fenwick and Casey Jones, a hockey-masked vigilante. As the pizza-loving heroes prepare for battle, the notorious Krang also emerges to pose an even greater threat.
April O'Neil
A former lab assistant to the mad scientist Baxter Stockman, April is the plucky human companion of the Turtles. April first met the Turtles when they saved her from Baxter's Mouser robots. She embarks on many of the Turtles' adventures and aids them by doing the work in public that the Turtles cannot.
Casey Jones
A vigilante who wears a hockey mask to protect his identity, Casey Jones has become one of the Turtles' closest allies, as well as a love interest to April. Casey first encountered the Turtles after having a fight with Raphael. He fights crime with an assortment of sporting goods he carries in a golf bag, such as baseball bats, golf clubs, and hockey sticks.
Splinter
The Turtles' sensei and adoptive father, Splinter is a Japanese mutant rat that learned the ways of ninjutsu from his owner and master, Hamato Yoshi.