Kunoichi Sumire

Sumire is a half oni, the offspring of a human mother and oni father. When Sumire was born, people called her a cursed child and drove both mother and daughter out of the village. Hauling her tired body, the mother went seeking for her daughter's father. However, nothing was there where the oni village once was. A sorcerer than approached the weary mother. Pleading that at least Sumire should have a chance at a good life, the sorcerer coaxed the mother into handing over Sumire. But contrary to what the sorcerer promised Sumire's mother, the real reason why the sorcerer sought Sumire was to use her as a core for a spell. It was Akayuki and Aoyuki who saved Sumire from the sealed box, which not even the lost souls could approach. After purifying the land of evil souls, the two arrived at the core of the spell and found Sumire inside the box. Discovering the child, Akayuki and Aoyuki were dumbfounded at first, but recalling their own past, they decide to take her in as their pupil.