Zero Kiryu

[close] Zero Kiryuu (錐生 零), who is one year older than Yuki Cross, came from a family of vampire hunters. Four years prior to the beginning of the story, his parents and brother were killed by the pureblood vampire, Shizuka Hiou, after they followed orders to assassinate her lover. The now orphaned Zero was taken in by Kaien Cross and became a school guardian, alongside Yuki. Because of what happened to his family, Zero grew to have a deep hatred for all vampires. Despite his grudge, it was later revealed that in result of the attack, Zero had been turned into a vampire himself. As his ravenous side began to surface, his best friend, Yuki, began offering her blood to him, to subdue his true vampire nature. It was also later revealed that his twin brother, Ichiru, also survived the attack and was willingly living by Shizuka's side. Upon consuming Shizuka, and despite the undeniable tension between the two men, Kaname let Zero drink some of his blood to keep Zero from losing control of himself in order to protect Yuki. After Yuki was transformed into a vampire, his feelings for Yuki were revealed, he was indeed in love with her. But Zero and Yuki were now standing on opposing sides; Yuki being a pureblood princess, and Zero becoming the president of the vampire hunters.