Ouri

Ouri is a pureblood, the fiancee of Sara Shirabuki after Rido's death. In the chapter 55 of Vampire Knight, Ouri was found dead at the hand of a human girl, a vampire hunter who was also found dead, by her own hand. It is said that all purebloods live eternally, but two known ways that purebloods can die is either by way of suicide or being killed by another Pureblood vampire or a vampire hunter. Ouri was found dead in a room at the vampire council and hunter's association meeting/ball. Some rumours were that Ouri committed suicide, or that he was killed by the vampire hunter, but neither of them or correct. Ouri was murdered by Sara Shirabuki, his fiancee. Sara bit the hunter, turning her into a vampire, then compelled her to kill Ouri, then herself afterwards. Ouri had known that his life was going to end by Sara Shirabuki, so he accepted his death.Since the Kurans are the highest pureblood vampires, Yuki Kuran is investigating on how to stop the rest of the purebloods from using innocents as instruments of suicide (although this human had been used for murder).