Reiri Kamura

A female vampire who attends the same school as Hiro. She has long black hair, always dresses in a dark sailor suit, and has idol status in her school. In the manga there are many scenes showing her in black underwear but in the anime those are reduced to panty-shots. She tried to get Hime's blood but failed. Later on she is banished from the vampire society for opposing Kiniski, she is pursued by Kiniski and the other vampires, who burn down the abandoned church she was living in, therefore losing her place so she freeloads at Hime's. At first she greatly detests Riza but their relations are changing gradually. Other than the blood from Royalty she also prefers blood from virgins and cute guys.

(Source: Wikipedia)