One of Silk's closest friends, Vivienne was involved in an accident with UFO-man that resulted in her being crushed and resurrected. Initially hesitant to use her powers as an Ultimate Girl due to embarrassment about indecent exposure, she decided to step up when Tsubomi failed in her first transformation and Silk refused again. Dubbed "Ultimate Girl Kyonyuu" by onlookers, Vivienne was faced with the challenge of avoiding exposing herself when her suit began to deteriorate. It was during this moment that she discovered how their powers worked by being embarrassed, which allowed her to generate an energy that could be used as a weapon against giant monsters. Despite being the biggest of the three Ultimate Girls, Vivienne harbors a secret crush on Silk.