Reika Kitami is the primary antagonist of the Bible Black series.
12 years before the events of Bible Black Reika Kitami was an innocent student trying to find her way in a new school. Nami Kozono, a rich student took an immediate interest in her going from flirting to attempted rape, but when Reika spurrned her affection Nami first kills a puppy who Kitami had become quite attached to and use it in a sacrifice. Nami then had a bunch of thugs horribly rape Kitami after showing her the dead puppy. Unfortunately for Nami, who needed a virgin for the upcoming ritual, she instructed the students to leave her a virgin (meaning they could only do her ass) but the boys eventually decide to vaginally rape her. Later when she was being uses at the ritual, it stopped working so Nami kills her members to make it work when the devil starts to appear Kitami the stabs her in the back and tramatized and desparate she takes the deal to save her life. This leaves her with powers but it comes at a price she only has a limited life. Later in life she works at the school as a nurse but knowing her fate she need to find a virgin to replace her body.
At some point in time before the events of the second oav series Hiroku Takashiro learned that Reika was inhabiting Imari's body and sealed her away. A group of occult bank robbers unknowingly release her and Kitami kills the robber before raping the bank teller. She then steals a shard of the Spear of Longinus.