Saeki Kaori

Saeki Kaori is a classmate of Minase (protagonist of Bible Black) with a fascination for the arcane arts. She has researched the history of the school’s magic club and the ritual held 12 years before the story opens, and when she discovers that Minase is able to use real magic she is determined to find out his secret whatever the cost. Unfortunately for her she finds herself quickly wrapped up in events beyond her control, and becomes one of the first to succumb to the tide of evil sweeping the school.

MyAnimeList