Ichiru Kiryu

Zero's younger twin brother. When they were younger, they were both taught by Toga Yagari to become vampire hunters. Ichiru, however did not seem to share Zero's natural ability and was often ill. Zero and Ichiru were very close as children, although later Ichiru claims to have hated Zero after overhearing that his parents preferred Zero over himself. Shizuka let Ichiru drink her blood to strengthen him and cure his chronic ill health, although she did not turn him into a vampire and he remains a human. He now attends Cross Academy as a Day Class student by the orders of Shiki's father, Rido Kuran. It appears Rido has promised Ichiru that he will kill those who killed Shizuka Hio, which is probably the main reason why Ichiru is working for Rido Kuran. Now he is after Zero, trying to prove who is the best vampire hunter. Ichiru has also warned Zero to stay away from Yuuki and stated "Your taste has gone bad". In the recent chapter 39, Ichiru appears while Zero was being held captive and shoots him with Zero's "Bloody Rose"...