Gohan: Gohan is the first son of Goku and brother of Goten. Gohan saves the world when he kills Cell. He marries Videl and has a daughter named Pan.

Goku: Goku is one of the saiyans that survivied when Freeza attcked the saiyan planet. He is also the father of Gohan, Goten, and a husband to Chi Chi. Dragonball Z is mostly based on Goku. Goku saves the world a couple of times and it is thought that Goku is the strongest Super Saiyan ever.

Goten: Goten is son of Goku and Chi Chi. Goten fuses with Trunks to become Gotenks.He tries to help the Z fighter to defeat Buu.

Trunks: Trunks is son of Vegeta and Bulma. He fuses with Goten to become Gotenks, but the fail and get absorbed.

Vegeta: Vegeta is father of Trunks and husband of Bulma. He and Goku are the only saiyan survivers. Vegeta goal is to be better then Goku and to beat him.