Leonardo

Leonardo, nicknamed Leo, is a fictional character and one of the four main characters in Teenage Mutant Ninja Turtles comics and all related media. He is often depicted wearing a blue eye mask. His signature weapons are two katanas. Leonardo is the most serious, the most spiritual, the most disciplined, and the most in-line with Splinter's teachings and thoughts, and is the leader of the Turtles. He is best known for being the leader of the Ninja Turtles as well as the most skilled. He is also known for being deeply fascinated with Karai, the adopted daughter of his archenemy: the Shredder. Like all of the brothers, he is named after a Renaissance artist; in this case, he is named after Leonardo da Vinci.