Hiou Shizuka

The pureblood vampire who bit Zero; even her fellow vampires are uneasy around her. She is called "Madly Blooming Princess" by her fellow vampires. A manservant whom she loved (a former human vampire, falsely classified by the Hunter's Association as Level E) was assigned to be killed by a Kiryu vampire hunter. Enraged and vengeful, she attacked the Kiryu family, killed Zero and Ichiru's parents, turned Zero into a vampire, and took Zero's twin, Ichiru, in as a devoted servant. Shizuka's blood can prevent Zero from falling to Level E, and thus Yuki risked her life for Zero to be able to drink Shizuka's blood. However, to protect Yuki, Kaname kills Shizuka and drinks her blood, leaving only a small amount for Zero to drink. Unfortunately the blood was drunk by Ichiru who arrived at the scene first. Before dying, Shizuka warns Kaname that he will live in darkness and has summoned a sinister future for himself. She was Rido Kuran's fiancée, but they never got married due to his previous disappearance and her death.