Leonardo

Leonardo, nickname Leo, is a fictional character and one of the four main characters in the Teenage Mutant Ninja Turtles comics and related media. He is often depicted wearing a blue eye mask.His signature weapons are two Ninjatos, which the fan base or writers commonly confuse them as Katanas.Leonardo is the eldest brother and the leader of the group.He is the most serious, the most spiritual, the most disciplined, and the most in-line with Splinter's teachings and thoughts.In some versions, He has a more-than-friendly feelings for Karai, the adopted daughter of his archenemy Shredder.Like all of the brothers, he is named after a Renaissance artist, in this case Leonardo da Vinci.