Radditz

Radditz is the first Saiyan Goku encounters in his entire life. He appears on planet Earth searching for his brother, Kakarrot, who turns out to be Goku. Trying to convince Goku to join him in interplanetary conquest, Radditz kidnaps Gohan. Piccolo and Goku join forces to defeat him, and Radditz perishes along with Goku from Piccolo's Mankankosappo, but not before he can transmit his knowledge of the dragonballs to his fellow Saiyans.