Krillion is one of Gokus best friends. He first appeared in the early episodes of the original DB series. He along with Goku trained with Master Roshi. He always and will be faithful to Goku and Gohan because they are all very good friends.
Krillion is not very strong but a very strong willed character. He adds alot of comic relief to the DB and DBZ series.
He later marries Android 18 who was turned into a human from the Dragonballs. He also has a daughter named Marron. he later grows hair.