Three Heroes

Long ago, Cult of Diablos kidnapped orphans without relatives to implant and collect Diabolos cells, in an attempt to create powerful soldiers to fight the Demon King Aurora|Diabolos]]. The experiments resulted in almost failure, since most of the children ended up dying, but a small number of subjects.

Luckily for the Cult of Diablos, three girls survived the experiments. They are Olivier the Elf, Lili the Beastkin, and Freya the Human. The cult carried out more experiments to make them stronger and powerful, creating weapons and equipment for them so that when they were adults and ready, they would go fight the Demon King Diabolos.

It was historically recorded that years later, the Three Heroes went to exterminate the demon Diabolos by order of the Cult, which resulted in the demon's defeat. During the battle, Olivier managed to cut off the demon's left arm with her sword, which was then sealed in the Sanctuary. In the end, she and the other two heroes were cursed by Diabolos so that their descendants would be possessed with rotten bodies. However, the truth was, three Heroes were the few people who are compatible with Diablolos cells. Hence, she was tasked by the Order to gather more Diablolos cells in order to produce more Tears of Diabolos.