Hello Friends,
I thought That some of the members here might have Problem with Dragon ball Z Characters, since There are so less no. of Posts in this section. So here am I with a Complete Guide of Dragon Ball Z Characters.......
Son Goku
When you first meet Goku in Dragonball he's about 12 years old (he tells Bulma that he's 14, but that's just because he doesn't realize that 12 comes after 11). He lived out in the mountains for as long as he could remember and was quite dumb. He couldn't even tell the difference between a male person and a female person without doing the 'pat-pat test'.
From the beginning (you probably already know this)
He was born on Planet Vegita, and is a member of the Saiyan race. The saiyans send out infants to planets with really weak populations because even one child of the race is powerful enough to conquere a weak planet when aided by the power of a full moon (they transform into giant monkeys). Goku was sent to Earth just before the Planet Vegita was destroyed by Freezer.
When on Earth he was found by an old martial arts master named Gohan. Gohan raised Goku but he was a real brat until one day he fell from a great height and hit his head. This caused him to loose his memory and forget about the mission to conquere earth that had been ingrained in him upon being sent off.
Goku always had surprising strength and when it came to martial arts, he was a genius (sort of an idiot savant!) He had a monkey tail, but other then that he seemed like a fairly normal person.
Throughout Dragon Ball goku changes a lot - he ages from his youth to an adult. He trains with the Honerable Muton Roshi (honerable my butt) with Kuririn, and participates in a number of Tenkai ichi bodukai (Strongest under the heaven tournaments). From Master Roushi he learns the Kame Hame Ha.
He gets married at the last of the tournaments in Dragonball, and it appears that he settles down and starts a new family - enjoying the peace. However this all ends when his brother Raditz shows up and refreshes his memory about his real ancenstry.
From this point on you see a number of huge changes in Goku. He eventually goes from the simple minded doaf who enjoys to play, but generally avoids fighting when not nessecary to a true saiyan warrior with emmence powers and a real desire for a good challenge. He's got a true heart and puts the safety and happyness of everyone else above his own needs, but will often put his own life in danger just to test and see how powerful the enemy really is.
Chichi
Chichi is the daughter of the great Ox King. Her father was trapped on a mountain surrounded by fire and Goku put it out with a Kame Hame Ha in order to get to him for something... ah, I don't remember what now though. Anyways, because of that, Chichi got a bit of a crush on him. She was the only girl violent enough for him anyways so it worked out nicely.
She and Goku got married after competing in one of the Tenkai Ichi Bokukai's (the last one shown during the Dragon Ball Series) and after all the chaos was over, settled down together and had a son, Gohan. Chichi, fed up with Goku's recklessness and irresponsibility, ends up being pretty harsh on Gohan. She makes him study all the time because she wants him to be a scholar.
Goten is a very different story though. After Goku is killed by Cell's Self-Destruction during the Cell Games, Chichi is left all alone with Gohan. However, just before the Cell Games started, Goku and Chichi got to have some free time and got a chance to consimate their love once again ^_^;; hehehe. Anyways, Goten was the result. In an extream contrast from her attitude with Gohan, Chichi actually trains Goten herself. Pushing him and is in fact the reason he goes Super Saiyan at such an early age.
Gohan
The first son of Goku and Chichi, Gohan is an extreamly large player, especially in the mid-to-later half of the Z series. After Goku is killed for the first time (while killing Raditz at the beginning of Z) Gohan is taken by Piccolo to train in preperation for the arrival of the Saiyans, Vegita and Nappa. He's really young at this point, and since Chichi has pampered him so much, he's a bit of a weeny. However his hidden potential is huge and Piccolo sees it.
He gains a lot of experience during the battles on Planet Namek while he was with Kuririn, and begins to feel more confident about himself. However he never really feels that fighting is his strong point. In preparation for the Cell Games, Goku takes Gohan into the room of Spirit and Time up on Kami's lookout and they train together for 1 year (during the time span on 1 day to the outside world). During this Goku realizes that Gohan has surpassed him in power and capabilities. The thing is that Gohan hasn't realized it yet. Goku quits in the middle of the fight with Cell and tells Gohan to take over. Everyone is shocked.
During the fight Gohan goes Super Saiyan level two, and eventually destroys Cell (but not until after his father is killed by Cell's Self Destruction feature)
After the Cell games end and peace is once again restored to the world Gohan stops his training and returns to his studies. It's over 7 years before he starts to fight again, and by that point, most all the other saiyans had surpassed him.
However!! Even later then this, Gohan is taken to Kai oh Shin's homeworld to train with the legendary Z sword. As a result of a small accident Gohan has (he breaks the sword! Dah! Kao oh shin freaks out!) Dai Kai oh Shin is Released! And he releases Gohan's full hidden potention (in exchange for a promised peak at Bulma's breasts) - making him more powerful in his normal standing form, then in Super Saiyan form (which is why you don't see older Gohan go Super Saiyan very often - he doesn't need to)
Goten
This is Goku and Chichi's 2nd son. He was born after Goku was killed during the Cell Games so he never got to even meet his father until he was almost 8 yars old. Goten is very different from Gohan, and extreamly similar to the young Goku we all knew from the original Dragonball series. He's very... simple minded, and very happy and easily confused. Goten lived at home with Chichi while Gohan went to school and studied. Chichi trained Goten while Gohan was away at classes and because of this, Goten became incredably strong without Gohan even noticing. It wasn't until Gohan was training for the Tenkai Ichi Bodukai that he discovered his little brother was in fact capable of going Super Saiyan already!! (it's an incredably funny scene too!)
Goten is really close friends with Bulma and Vegita's son Trunks. Trunks is about one year older then him, but the two get along pretty well and usually use each other as sparing partners.
Pan
Pan is barely introduced in Z. She comes in during the last 5 episodes of the series (there are 291 episodes of this series, mind you) but she plays a very large role in the following series, Dragonball GT. She is the daughter of Gohan and Videl - and thus the great-grand daughter of Goku. Like Goten and Trunks, she reaches a fairly high power level at a young age, but she doesn't go super saiyan. She does however become more powerful after she's cried. ^_^
Don't make this kid cry - you'll regret it.
Dr. Briefs
He is the father of Bulma - the first person that Goku meets in Dragon Ball. Dr Breifs is a highly skilled scientist who invents all sorts of things and founded the Capsule Corperation. His company makes this small capsules that have a button on the end that once pushed, explodes into some sort of neat and useful technological device.
Bulma
The 2nd character that you meet in Dragon Ball and she manages to stick it through all the way to the end. In the beginning, Bulma is on a quest to find the Dragon Balls. She uses one of her neat little inventions - the Dragon Radar - to detect their location, and this is how she ends up finding Goku. (He had the 4 Star Dragon Ball in his possession)
She wanted the Dragon Balls so that she could wish for a boyfriend, however while on the journy with Goku to find all the DBs, she ends up meeting Yamucha - a man who just happened to want the DBs in order to wish for a girlfriend. It worked out nicely... for a while. But Yamucha was too much of a womanizer for her and she eventually left him for good.
She ends up inheriting her father's company - as well as his techi knowledge and it's because of this that she ends up going to planet Namek with Gohan and Kuririn. (She runs the Space Ship) She doesn't get to do much there, but when it's all over and everyone (except Goku) is back on Earth, she ends up taking everyone of the Nameks -And Vegita- into her house.
Vegita realizes that the reason that Goku isn't back is because he's off somewhere training so he begin's his strenuous attempts to go SSJ while staying at the CC headquarters. He has Bulma and her Father create training gadgets for him and constantly hurts them, and himself while attempting to push himself beyond him limits.
Everytime he nearly killed himself Bulma would be there by his side to nurse his wounds. No matter how much he bitched at her, and now how much she bitched back, they ended up being drawn towards each other and became involved. The two of them, however, never officiall marry. But they do end up having two children.