Kasu is a namekian that was 'kidnapped' by Towa and Mira after they were in need of a minion. (This was before Towa discovered the ability to turn people into her minions). Towa went back in time and made the orginal King Piccolo spit out a egg for her to be her minion. Towa and Mira then trained the newley born Kasu and made him stronger then Frieza, Cell and even Majin Buu! As a reward for Kasu helping Towa and Mira for about 6 years Towa sent Kasu to the present to and let him do what ever he wants. Kasu wanted to discover his heritage and revive the orginal King Piccolo, and thats what he did. Little did Kasu know that this was just a scheme from Towa and Mira to get him out of there hands since Towa has finally discovered the ability to turn people into her minions.