Genbu

Genbu, The Black Tortoise, is one of The Four Sacred Beasts and the indirect founder of The Kame Sennin-Ryu martial arts school and its techniques. He is one of the strongest noble Youkai and is responsible for creating The Sacred Waters of The Tortoise/Kame. Of The Four Sacred Beasts, Genbu is known to hold the title of the most indesctructable and durable being amongst them.