Aside from Son Goku, the other main character met in the first episode/chapter if Dragon Ball.
Who is Bulma?
The first person Raditz encounters when he lands on Earth.
Who is the farmer with shotgun?
The name and form of Goku and Vegeta's fusion.
Who is Super Saiyan 4 Gogeta.
What is the new form Goku acquires near the start of the anime series?
What is Super Saiyan God?
The natural energy everyone in the Dragon Ball universe has/uses.
What is Ki (Chi)?
First person revived by the dragon balls.
Who is Bora?
The first "Z Warrior" to die in the series.
Who is Son Goku?
The person(s) that finds the black star dragon balls in the lookout.
Who is Emperor Pilaf (Pilaf Gang)?
This universe is revealed to be the universe where our main characters are from.
What is Universe 7?
The amount of dragon balls in the whole series.
What is 28?
The original color of Son Goku's gi.
What is Blue?
The person who defeated Cell, according to public knowledge within the series.
Who is Mr. Satan (Hercule)?
The shadow dragon that controls the fire element.
Who is Nouva Shenron?
The name of the planet size dragon balls introduced in the series.
What are the Super Dragon Balls?
The amount of Broly movies.
The person that won the 22nd Tenkaichi Budokai.
Who is Tenshinhan (Tien)?
The person that killed Frieza.
Who is Trunks?
The technique Vegeta used against Super 17.
What is the Final Shine Attack?
The technique Goku and Trunks learned in order to defeat Zamasu (originally in Dragon Ball).
What is the Evil Containment Wave (Mafuba)?
The person that went back in time and became a Super Saiyan.
Who is Bardock?
The person that taught Son Goku the Kamehameha.
Who is himself?
The name of the announcer for the Cell Games.
Who is Jimmy Firecracker?
The name of the race that shared Planet Vegeta with the saiyans.
Who are the Tuffle?
The name of the girl who trained with Tenshinhan (Tien) when they were younger.
Who is Yurin?
The name of Planet Vegeta before it was renamed.
Planet Plant.