Splinter is an incredibly wise character in the Teenage Mutant Ninja Turtles series. Despite being a mutant rat, he has mastered oriental martial arts and serves as a father figure and sensei for the Turtles. Originally an ordinary house rat, Splinter observed his master's training from his cage and absorbed all the knowledge and skills. Through his guidance and teachings, he imparts valuable life lessons and instills discipline, loyalty, and courage in the Turtles, making him an invaluable mentor and source of wisdom.