Olivier

Olivier (オリヴィエ) 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.

Appearance
Olivier is described as a beautiful, gallant, almost divine even, figure of a woman warrior. Her appearance looks like a mirror image of Alpha.

Synopsis
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 so 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, the Wandering Swordsman Venom managed to summon her via Trial of Goddess but Olivier won the match.

Holy Ground Infiltration
During the infiltration of the Holy Ground, the group consists of Alpha, Delta and Epsilon manage to infiltrate the Sanctuary with the help of their lord Shadow, along with Beta (disguised as Natsume), Rose, Alexia, and Nelson who held him hostage. There, Alpha reveals the truth of everything as well as her relationship with Olivier, and how Olivier is treated as a real man, she is a woman and how the cult distorts history, and for more later Nelson reveals himself and tries to kill everyone but Delta and Alpha confront him without problem.

Then Olivier is summoned as a puppet with no will of his own but with great magical power by Nelson to eradicate the members of Shadow Garden, but they retreat before Olivier started fighting them, especially with Delta, who was in ecstasy for fighting, after having defeated more than a dozen of Nelson's magical copies.

Later, Olivier is ordered by Nelson to kill Cid who was there along with Aurora ghost. Cid manages to dodge her deadly strike, but then after receiving multiple wounds on his body. In the end, he receives a fatal wound from Olivier (fake), but Cid takes advantage and destroys her neck to later impale himself and get rid of multiple Olivier's copies, and at the end he destroys the entire Sanctuary together with Olivier (fake) and Nelson.

Powers & Abilities
The only survivor of the Cult of Diablos' experiments with the cells of the Demon Diablos. It can be assumed that Olivier was considerably powerful, capable of defeating the demon and sealing it away. Shadow himself noted that the projection of Olivier summoned by Nelson paled in comparison to the real deal.