Piccolo (ピッコロ・ジュニア, Pikkoro), is the reincarnation and final son of the original King Piccolo, and was born to avenge his father's death at the hands of Goku. According to Guru, Piccolo, along with Kami and King Piccolo, are part of the Ryu or Dragon Clan, who were the original creators of the Dragon Balls. After his narrow defeat against Goku, Piccolo is soon forced to form an, at first, uneasy alliance with Goku and his friends against newer, more dangerous threats. Thus, he and Goku kick off the formation of the Z Fighters. Also, out of necessity he also takes it upon himself to train Goku's young son Gohan, forming a powerful bond which ultimately redeems him when he sacrifices himself to save the child's life. After his resurrection he fully joins Goku and the others in their struggles against ever more powerful villains on Planet Namek and Earth. As the story progresses, his role shifts from warrior to mentor. (dragonball.wikia.com)
