Olivier was Alpha's ancestor and one of the three heroes who defeated the demon Diabolos. In reality, however, she was a pawn of the Cult of Diablos, being a survivor of their experiments, tasked by them with defeating the demon for their own ends. Olivier is described as a beautiful, gallant, almost divine even, figure of a woman warrior. Her appearance looks like a mirror image of Alpha. Many years ago, Olivier cut off Diablos' Left arm with her sword then sealed him in the Holy Ground. Then she was cursed by Diabolos that her descendants would be possessed with rotten bodies. However, the truth was, Olivier was one of few people who are compatible with Diablos's cell. She was tasked by the Order to gather more Diabolos cells. In recent years, someone managed to summon her via Trial of Goddess but Olivie won the match.