緋桜 閑, Mad Blooming Princess
The pureblood vampire who bit Zero even her fellow vampires are uneasy around her. She is called Mad Blooming Princess by her fellow vampires. A manservant whom she loved a former human vampire said to have never fallen to Level E was killed by a Kiryu vampire hunter. In retribution she attacked the Kiryu family killed the parents turned their son Zero into a vampire and took Zeros twin Ichiru in as a devoted servant.