Piccolo, pictured left

Piccolo is actually a replica of a Namekian called Kami-Sama, which means a Guardian or a God. Kami-Sama was sent to Earth to take the position as the Guardian of Earth, however, in order for him to satisify that position, he must release the evil side of himself so Kami-Same would be a pure hearted God. However, during the process of releasing his evil spirit, and the evil version of Kami-Same became alive, and became an evil replica of Kami-Same called Piccolo-Devil. Gokou, eventually met Piccolo-Devil and had an intense battle with him. When Piccolo-Devil was killed, he released an egg which later hatched and became Piccolo.

Since Piccolo was an egg released by Piccolo-Devil, so it was no doubt that Piccolo was evil as well. However, the evil side of him slowly disappeared when he started training Gokou's son, Gohan, where Gohan helped Piccolo to realise the good side of him. Gohan's charm and wit and his innocence just like his father changed Piccolo, and as time passed by and their relationship grew, Gohan took Piccolo as his one of his role models. The once evil Piccolo eventually became a major force battling alongside with Gokou and the rest of the Saiyans.