Bulma (Japanese: ブルマ, Hepburn: Buruma) is a fictional character in the Dragon Ball franchise, first appearing in the original manga series created by Akira Toriyama. She made her appearance in the first chapter "Bulma and Son Goku", published in Weekly Shōnen Jump magazine on June 19, 1984, issue 51, meeting Goku and befriending him and traveling together to find the wish-granting Dragon Balls.
Bulma is the daughter of Dr. Brief, the founder of Capsule Corporation, a company that creates special small capsules that shrink and hold objects of various sizes for easy storage. Being the daughter of a brilliant scientist, Bulma is also a scientific genius, as well as an inventor and engineer. Along with creating the Dragon Radar, a device that detects the energy signal emitted by a Dragon Ball, Bulma's role as an inventor becomes important at several points in the series; including the time machine that brings her future son Trunks to the past.
Source : Wikipedia