Yuki Cross

she is the adopted daughter of the headmaster at cross academy where day class is for humans and night class for vampires. she works as a guard to keep day class students from sneeking out to see the night class, she works with another day class student named zero (who is actually a vampire but doesn't tell her).

yuki may look shy but she is hardcore she is one of cross academy's prefects and a perfect one indeed with her friend and childhood company zero she and zero will face difficult changles like the night class consists of vampires and yuki must try and stop zero from killing them so yuki's life is hard if i say so

Yuki Cross is the female protagonist of Vampire Knight. The adopted daughter of the headmaster of Cross Academy, Yuki is a first year student and a member of the school's disciplinary committee, which means secretly acting as a Guardian for Cross Academy by monitoring and protecting the Day Class from the Night Class. She 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.[1] She wields the Artemis Rod, the anti-vampire weapon which later transforms into a scythe.

As a small child without memories, Yuki was saved by Kaname from a vampire and she has had deep feelings for him ever since. Yuki is adopted by Kaien, but has troubling recurring nightmares until Zero joins their household and she forms a strong attachment to him. Yuki discovers that Zero has awakened as a vampire and is struggling with his blood lust, she allows him to secretly feed on her blood. Yuki promises to be his ally and that she will kill him if he becomes a level E vampire. When Shizuka Hio offers to save Zero at the price of Yuki's humanity, Yuki agrees, though is stopped by Zero.

When Yuki's memories begin to resurface, Kaname bites Yuki to reawaken her true nature and restores her complete memories. It is revealed that Yuki is actually a pureblood vampire and the child of Juri and Haruka Kuran. Following Rido Kuran's attack on the Kuran's, killing Haruka, Juri had sacrificed herself to seal Yuki's vampire side and erase her daughter's memory. Upon returning to her vampire self, she begins to sense Rido's dangerous revival. Though Kaname attempts to remove her from danger and she refuses to leave Cross Academy. Resolving to fight Rido, Yuki's Artemis Rod transforms into a scythe.

Kaname and Zero become allies and together they defeat Rido. However, Zero then turns on Kaname, intending to kill him. But Yuki comes before he has the chance. After Zero fails to kill Kaname, Zero and Yuki go into a room where Yuki declares she is a vampire by biting Zero. Yuki declares that she will run from him forever to keep him alive. Despite being in love with both Zero and Kaname, Yuki decides to spend all of eternity with her older brother.