Bikini Brief

Bikini (ビキニ Bikini) is the wife of Dr. Brief, the mother of Tights and Bulma, the mother-in-law of Vegeta, and the maternal grandmother of Trunks and Bulla.

Bikini went unnamed in the original manga, anime and guidebooks, only ever being referred to as Bulma's mother (ブルマのママ Buruma no mama).[1] In an interview, Toriyama noted that had he named her he probably would have gone with Panchy (パンチー Panchī), which was later used as her name in Dragon Ball SD.