Master Mutaito was one of the greatest martial artists of all time, and is the first known person to act as Earth's savior (Something that was the main role of Goku throughout his life). He was the teacher of Master Roshi, Master Shen, and many other students who taught them some of the most amazing skills of the martial arts. He is the younger brother of Master Haito. He first appears in a flashback and later in a cameo appearance in Dragon Ball. Mutaito also appears in Pre Dragon Ball.