Teenage Mutant Ninja Turtles Splinter Protective and precise, Splinter is an un-matched Ninja Master with a playful and deep spirit that probably comes in handy raising his mutant sons, Leonardo, Raphael, Donatello and Michelangelo Once a human known as Hamato Yoshi, Splinter continues his tradition of teaching Ninjutsu and fighting the evil Foot Clan Teenage Mutant Ninja Turtles and all related titles, logos and characters are trademarks of Viacom International Inc