Minamoto, Chizuru

源ちずる

Chizuru is a second-year female student at Kouta's school. She appears to be a normal, albeit big-breasted girl, but is actually a 400-year-old powerful fox deity (when she reveals herself, her hair changes from black to blond). She is constantly hanging around and on Kouta, though he is the only male she acts genuinely toward. She loves Kouta very much and wants to enter a "relationship of sin" with him.
In the manga, it is quickly revealed that Chizuru and the others are living in a correctional facility for Youkai. While Chizuru is trying her best to consummate her relationship with Kouta (for still somewhat ambiguous reasons), she faces a fair share of problems to overcome.
In the anime, Chizuru basically does little else than trying to force herself on Kouta, almost regardless of where they are and what Kouta feels about this, and then throwing tantrums whenever someone else makes a beeline for him.