Goku
Goku is the main character of Dragonball and also in Dragonball Z. But in DBZ,there are many other characters witch are playing a good part of the show, such like Gohan,Krillin Piccolo. In Dragonball,Goku was just a small boy.He met Bulma up there. Goku was a bad baby in the begin,but he falled out off a cliff on his head. Until that time,he was a sweat guy.His grandpa,Gohan,taked care off him. Goku is very strong.One part is because he wen 2 King Kai. Every Time when Krillin Gohan & Piccolo are in deep trouble,Goku shows off. Remember the Saiyam Saga & Ginyu Saga and Frieza Saga.. Goku is a Saiyan.Saiyan have good powers.But,Saiyans are most likely bad people. Remember Vegeta,Nappa & Radditz.Goku was the second Super Saiyan,after 3000 years. He became a SSJ because Frieza killed Krillin.