The Red Winter

Hana Cross is a student at Cross Academy; her story takes place before her little sister Yuki begins her time at the pristine school. She is part of the Disciplinary Committee along with her friend Viktor. Their responsibilities include helping the mysterious Night Class, who just so happen to be vampires. Hana and Viktor are the only ones who know their true identity, and Hana's father who's the headmaster intends on keeping it that way.
Hana doesn't mind helping the Night Class, but one person she absolutely can't stand is Kaname Kuran. She finds him arrogant and narcissistic because the vampires always refer to him as Lord Kaname, like he's some royal. Kaname finds her amusing like her sister, and he finds her trustworthy for some unknown reason. He trusts Hana enough to tell her of the Level E vampires that were seen stalking the school. Even though Hana finds Kaname irritating, but she doesn't want the vampires to die. She will do anything to protect her friends, family, and the school who brought her up to be the greatest vampire hunter the world has ever seen.