vampire knight

Yuki Cross (黒主 優姫, Kurosu Yūki?)
The adoptive daughter of the headmaster of Cross Academy, Yuki is a member of the school's disciplinary committee, which is also known as Prefect (Guardian). Ten years prior to the events of "Vampire Knight," Yuki was attacked by a vampire, but was rescued by Kaname. She has lost all memory of her life before the attack because her mother, Juri Kuran, used her pureblood powers to put her vampire side to sleep, and Headmaster Cross took her in as his own daughter. She, like Chairman Cross, believes that vampires and humans can live together peacefully.[1] She has also been giving her childhood friend Zero her blood to save him from becoming a Level E vampire. She and Kaname were raised as siblings by Yuki's parents, Juri and Haruka Kuran, who were also siblings and heads of the Kuran line of pureblood vampires. She is also Kaname's fiance, whom she believes to be her brother, and Kaname has yet to tell her the truth about who he is.[2] Yuki loves Kaname, who has always been protecting her and has been by her side during her childhood as a vampire. When Rido Kuran, their uncle, resurfaces at Cross Academy, Kaname awakens Yuki's vampiric side and pureblood powers.

Zero Kiryu (錐生 零, Kiryū Zero?)
Zero, who is a year older than Yuki Cross,[4] comes from a vampire hunting lineage. His family was killed by the pureblood vampire Shizuka Hio because of one of the assignments his parents carried out. Zero was taken in by the headmaster of Cross Academy and became a Prefect (Guardian), alongside Yuki Cross.[5] He has a great hatred for vampires because of what happened to his parents and that he was raised to hunt vampires, though it is revealed that he is a Level D vampire due to Shizuka's attack four years ago.[6] It was believed that Zero was the only survivor of the attack, but it is later revealed that Zero has a younger twin brother named Ichiru who is living by Shizuka's side. Due to a turn of events involving Shizuka and Rido Kuran, Kaname ends up consuming Shizuka, thus becoming more powerful. He then lets Zero devour some of his blood to subdue the Level E vampire side which threatens to take control. Kaname only does this for Yuki's sake for he does not truly care about Zero's fate.

Kaname Kuran (玖蘭 枢, Kuran Kaname?, romanized as "Clan" in later issues of Lala Magazine)
A pureblood vampire, Kaname saved Yuki from an attack by another vampire when she was little. He is the class president of the Night Class, much feared and respected by the other Night Class students. While he is cold and authoritative towards his fellows in the Night Class, he is always kind and sweet to Yuki. He has shown that he cares deeply for Yuki, and loves her in a romantic sense. He allows Zero to live because he knows his death would sadden Yuki, and because Zero is useful. He is both jealous and angry of Zero for biting Yuki and endangering her life. Kaname has been raised as Yuki's older brother. At a young age they had pledged to marry each other when they grow up, just like Haruka and Juuri, who were siblings yet married to each other. It is common for pureblood siblings to marry as it is essential to keep the bloodline pure. Also, a fact yet to be revealed to Yuki is that Kaname is not her "true brother". He is actually the ancient ancestor of the Kurans, and Rido is his master who awakened him from his grave, making him unable to kill his 'master'.