Kame Sennin
Master Roshi (武天老師 Muten Rōshi, lit. "Old Heavenly Martial Arts Master"), also known as the Turtle Hermit (亀仙人 Kamesen'nin), is a master of martial arts, who trained Gohan, Ox-King, Goku, Krillin, and Yamcha. He has a sister named Fortuneteller Baba. He is also a hermit and a pervert.