Good Guys

-Goku: Main character of DB/Z/GT.  He is a Saiyan warrior that was sent to earth as a baby to kill the inhabitants and make it ready for sale.  When he arrived, an old man, named Gohan, found him and decided to take care of him.  His Saiyan hertitage made him an awful child for Gohan to take care of...but accidents do happen.  One day while taking a walk with Gohan, Goku tried to touch a butterfly and fell into a ravine and forgot his orders and started to be a pleasent child, but one part of his Saiyan heritage still remained...his tail.  One night, during a full moon, Goku transformed into a were-monkey and killed Gohan.  Goku forgot what happened to his adoptive grandfather after he had transformed back into his old self.  Thoughout the series he remains the strongest characters.

Stats:
-Wife is ChiChi
-Sons include Gohan and Goten
-Brother is Raditz
and his father is Bardock.

-Gohan(Little kid next to Goku with hair in the picture above, that's when he's younger.): First son of Goku.  Half Saiyan, half human, and good-hearted, but doesn't like to fight.  He has lots of hidden powers that he uses when he becomes really mad.  This anger drives him to the edge and causes him to become the first Saiyan on earth to go Super Saiyan 2 in the Cell Saga.  Grows up to become a scholar.

Stats:
-Wife is Videl
-Father is Goku
-Mother is Chi Chi
and has one daughter named Pan.

-Vegeta: Ah my favorite character.  One of the greatest bad-asses in the series.  He is Prince of the Saiyans and is full of pride.  He first appears in the Saiyan Saga to get the Dragon Balls from earth with his care-taker Nappa.  After being defeated by Goku and Co. he decides to get the Dragon Balls from somewhere else...namely a little planet called Nemek, and since Nappa killed Piccolo, the earthlings must go to Nemek for the Dragon Balls too(Piccolo later discused).  Really a bad guy during the first third of the series, until he marries Bulma.  Awesome fighter and one of the greatest villians ever(Next to Sephiroth).

Stats:
-Wife is Bulma
-Father is King Vegeta
-Was servant of Freezer
and has one son named Trunks, and one daughter named Bra, yeah that's right BRA!

-Piccolo: Strong Nemekian warrior that is the bad half of Kami(God of Earth, again later discused).  While a bad guy in Dragon Ball, he starts to turn into good when Dragon Ball Z starts.  Smart and mysterious in the begining, he takes Gohan and trains him when Goku dies.  He trains him and finds himself becoming a good guy, because he fells that "Gohan is the only one that ever treated him like a person."  While he's an alien, his power is still greater than most of the humans later in the series.

Stats:
-Has no wife, since s/he is asexual.
-Bad half of Kami.