Hazuki  

Luna, 葉月

Hazuki was a teenage vampire who had been kept in a German castle since she was separated from her mother. With the help of Kouhei, she escaped and fled to Japan to find her mother. When a vampire drinks a human's blood, that person becomes their servant, but for some reason, Kouhei remained unaffected when Hazuki did it to him. Despite claiming he must serve her as a slave and obey all of her commands, Kouhei refused to do so. Additionally, Hazuki has an alternate personality named Luna, which was imposed upon her by her vampire relatives in order to keep her under control.