Bulma (ブルマ Buruma, lit. "Blooma") is a brilliant scientist and the second daughter of Capsule Corporation's founder Dr. Brief and his wife Bikini,[12] the younger sister of Tights,[13] and is Goku's first friend.[1][2] She used to be the girlfriend of Yamcha,[14][15] but moved on (while remaining friends with him) and, eventually, became the wife of Vegeta, as well as the mother of Trunks and Bulla. A technological and scientific genius who can turn her talents to almost any field and understand alien technology near-effortlessly, her inventions, and the resources of Capsule Corporation, have been invaluable to Goku and the rest of the Dragon Team many times. Her most notable invention is the Dragon Radar Bulma is the most significant female character in the series. Aside from Goku, Bulma is the single longest-running character in the entire meta-series, being introduced in the first Dragon Ball chapter and episode and maintaining a prominent role until the end of the series.