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
Yuki Cross is a first year student at Cross Academy. In her capacity as a Guardian for Cross Academy, she is responsible for the nightly duties of monitoring and protecting the Day Class. Yuki carries the anti-vampire weapon, the Artemis Rod. Yuki is generally a cheerful and comedic character, but has a fear of vampires that means she rarely leaves the Cross Academy grounds on her own.

History
When Yuki was approximately 5 years old, Rido Kuran attacked the Kuran family seeking to take Yuki. To protect her daughter, Juri sacrificed herself to seal Yuki's vampire side and erased her daughter's memory. Yuki's first memory is that of Kaname saving her from a vampire. Yuki grew up harboring deep feelings for him and the two had a close relationship. Yuki had troubled nightmares nightly until 4 years ago, when Zero joined their household and Yuki formed a strong attachment to the boy. Yuki's relationship with Kaname became distant after she witnessed his vampire nature as he feed on a vampire classmate and as a human, Yuki believed she had no chance with Kaname and began to fear him a little, but her infatuation with him remained.

Plot Summary
Following her discovery of Zero's awakened nature as a vampire and his subsequent struggles with bloodlust, Yuki chose to go against taboo and allowed Zero to feed upon her in secret. In order to prevent Zero running away, Yuki promised that she would be his ally and that she would kill him when he became a level E vampire. She also attempted to bargain her humanity for Zero's life when Shizuka offered her a deal, but Zero prevented her from becoming a vampire.

Troubled by the gap in her memory, Yuki attempted to ask Kaname to reveal what he knew. Kaname bargained the answer in return for her becoming his lover. Yuki admitted she loves him and agreed to his proposal, but when she didn't get an answer, she attempted to remember on her own, causing herself waking nightmares, at one point almost suffocating Zero. Kaname then bit Yuki and re-awakened her as a pureblood vampire and drinking his blood brought back the complete memories of her past. Yuki was reunited with Kaname as his sister and his possible fiancee.

Returning to her vampire self, Yuki exhibited the uncontrolled return of her vampire powers return and physical changes also occurred. Yuki chose to break her friendship with Zero, aware of the new antagonism between them, however Yuki retained her friendship with her bestfriend, Yori. Yuki began to sense the danger of Rido's revival and Kaname attempted to remove her from danger. Yuki refused to leave the school, but convinced Kaname to leave and continue his mission. Yuki's ignored the Artemis Rod's attempts to reject her vampire nature which caused it to morph into a new weapon as a scythe.

Yuki finally confronted her uncle Rido and almost fell prey to his words. Zero interrupted them attempting to kill Rido. Yuki reconfirmed her vow to be Zero's ally despite being called his enemy. Though Zero attempted to remove her from the fight, Yuki managed to score the killing blow on her uncle. With Zero now intending to kill her, Yuki stands ready to defend herself.