Leonardo or his nickname Leo is the leader of the Ninja Turtles, he is the oldest of his three brothers Raphael, Donatello and Michelangelo in addition to being the oldest of all the brothers, his home is in the sewers of New York City. Use katanas. Splinter serves as the Turtles' adoptive father and sensei. Leo is a green anthropomorphic turtle ninja warrior. His eyes are blue with and he wears a blue mask bandana. He is serious, mature and focused but also becomes playful.