Master Roshi

The Turtle Hermit is the venerable martial arts master responsible for training not only Goku, Krillin, and Yamcha, but also ChiChi's father the Ox King and Goku's adopted grandfather. He is the inventor of the Kamehameha, and is quite strong despite his age. Kamesennin is also the stereotypical old man pervert character of the series, refusing to train the two boys until they bring him a "hottie".