Vivienne Ootori

One of Silk's best friends. She along with Silk and Tsubomi were accidentally crushed and resurrected by UFO-man. Nervous about indecent exposure, she does not try her powers as an Ultimate Girl until Tsubomi fails in her first transformation and Silk refuses to do so again. Left no choice, she offers to go, being dubbed Ultimate Girl Kyonyuu (Big Boobs) by spectators. When attempting to avoid exposing herself when her suit deteriorates, Vivienne is the first to learn how their powers are supposed to work, by being embarrassed, they generate an energy which can be projected as a weapon against the giant monsters. Vivi easily is the biggest of the three Ultimate Girls. She has a secret crush on Silk.

(Source: Wikipedia)