You may be asking, which is stupid, what is this so called Dragonball Z???? Well sir and or mam, yer stooopid. Dragonball Z is  one of the #1 toys and best-selling apparel for kids in america. And an awsome anime. It is  about a bunch of people with powers of justice going out and finding the dragons balls so they can make a wish to bring one of there fallin from battle, friends back and or another perverted wish. But the series more or less now is at the point where they just kick bad evil scums asses! Which is  cool. Well heres some charecter info!
Son Gokou- He is the hero of the series, he has a kind hearted soul, though at one point his kind heart was going to explode, and is very powerful. He is a saiyan from the planet Vegita, he was sent to earth to kill all the human race but hit his head and forgot all about it.
Chi-Chi- Chi~Chi is Gokus wife, she is a very harsh,strict,but also loving. She doesent really kick alot of ass, but dont piss her off shell go crazy and kill things rampetly. Just kiddin bout the killin part. She isnt seen to much in the series.
Gohan-Gohan is Goku and Chi~Chi's son. He is very powerful because he turns super saiyan at such a young age. He is also a saiyan but only a half saiyan its like

  Goku(Saiyan)-Chi~Chi(Human)=Half sayain....

I think you get the picture. In many ways Gohan is also the hero of the series.
Vegeta- Vegeta is my favorite charecter, he is a saiyan like goku, but isnt as kind as goku,  Vegeta is Cold hearted at times, in the begining he is a bad guy and Goku and Vegeta battle it out. Vegeta then comes back and eventually becomes a good guy. He is very powerful, but not as powerful as Goku. Could Goku's kind heartedness mean something? Huh? Could it???
Bulma- Bulma is a human from the planet earth. She helps goku in Dragonball from the begining of the series right till the end of Dragonball GT. She is a very adventurous lady and ends up marrying the most unsuspecting person. You may think its gonna be Yamcha at first but then BAM! She marries Vegeta. Wow that was uncalled for. And they dont go to well together but what happens next???
Trunks~ Trunks is the son of Bulma and
Vegeta. He is only a half saiyan like Gohan. He is very powerful because he beocmes a Super Saiyan at a younger age than Gohan. Really young. Could he be a very powerful fighter? YES! But he has many witty remarks.
(Ill add more chr info soon :)