Krillin (クリリン, Kuririn?) is a fictional character in the Dragon Ball manga, authored by Akira Toriyama, and adapted to the Dragon Ball anime, Dragon Ball Z, and Dragon Ball GT.

Krillin is introduced in Dragon Ball as a rival (and later best friend) of the main character, Son Goku. Later in the series, he can also be seen to have a close relationship with Goku's child, Son Gohan. Krillin eventually settles down and marries Android #18 after the cliff-hanger Cell Games to have a child named Maron.

Source: Wikipedia