Yuki Kuran

Yuki Cross is the adoptive daughter of the headmaster of Cross Academy, and is a member of the school's disciplinary committee, which is a Guardian for Cross Academy.

Background
Ten years prior to the events of Vampire Knight, the Kuran family was attacked by Rido Kuran, so Yuuki's mother Juuri, wanting Yuuki to live as a normal human, sealed Yuuki's memories, powers and pure vampire blood at the cost of her own life, and Headmaster Cross took her in. She lost all memories of her life before the attack, but since Kaname rescued her when she was attacked by a vampire, she has been harboring deep feelings for him. She admired Kaname since she was small until present time. Yuuki is usually a cheerful and carefree n500338113_449481_8131.jpg girl. She has also let Zero Kiryu, a childhood friend, drink her blood, hoping to save him from insanity. She cares deeply about Zero, and thinks of him as a brother. It was revealed in chapter 35 that she is the hidden daughter of the Kuran family, a family of pureblood-vampires. She and Kaname are engaged. She does have vampire powers as well, as this was witnessed in chapter 36. As Yuuki was getting over the shock of her parents deaths to save her, she accidentally made cracks in the window.

As it is shown in chapter 37, during a short talk with Zero, Yuuki refers to herself as not being the same as before. Zero can sense that Yuuki is a pureblood and aims "Bloody Rose" at her. Yuuki claims that her vampire side "ate" her human one and the new Yuuki is nothing like the one that Zero knows. Although her declaration could have been because of the pain of having Zero pull out a gun on her, especially since immediately afterwards she is creeped out by one of the popular night class boys speaking to her respectfully, saying 'it's gross' and that she expected him to keep saying 'Yuuki Cross or hey you'. She may have been simply referring to the changes in her life the situation will force on her.