Hasegawa Kobato

Kodaka's younger sister; she is a student in middle school, but nonetheless joins the club. She is very close to her brother, who she calls "An-Chan", and behaves in a jealous and clingy way whenever she feels that he is not giving her the attention she deserves, to the point where it is obvious that she has a brother complex. She sees Maria as a rival for Kodaka's brotherly affections and so often gets into fights with the latter. She has had a penchant for darkness, vampires and the macabre ever since she started watching an anime called Kurogane no Necromancer. The reason why Kobato cannot make friends, (or rather, doesn't want to make any friends) is because she is under a constant self-delusion of being a Gothic vampire, and being naturally shy. In fact, she is wildly popular with the other students of her class, boys and girls alike.