BULMA
Bulma has been around from the beginning. In Dragon Ball, she was a mixed up teenager with blue hair, a pink outfit, and a personality quirk that wouldn't allow her to shut up for a second. She was immature, emotional, self-centered, impatient, argumentative, boy-crazy and given to fits of hysteria.

Now, she's blossomed into a woman with a lot of the same personality quirks, but the team would never get along with out her. Bulma is a mechanical genius who can operate and fix anything. She is the one that discovers the capabilities of the Saiyan Scouter and enhances it for their own use. It enables her to save the day more than once. She  also takes the lead in finding a space ship to go to Namek and joins Krillin and Gohan in the journey.