MAIN · THE STORY · CHARACTERS · REVIEWS · BACKSTAGE CHARACTERS Click on the links below for descriptions of the four main characters from Teenage Mutant Ninja Turtles. The animated world of Teenage Mutant Ninja Turtles features hundreds of characters, but the selected descriptions below focus on the four heroes in a half-shell from this extensive cast. Leonardo | Donatello | Raphael | Michelangelo