Aidou Hanabusa

Nicknamed "Idol" by the Day Class girls. Along with his cousin Akatsuki Kain, Hanabusa Aido is known among the Night Class as "Kaname-sama's right hand" and has a fierce admiration for Kaname. Aido is a noble-class vampire and possesses the ability to control ice. Though he appears cheerful and friendly one moment, he can quickly become vindictive and cruel the next. Though loyal to Kaname, he has a tendency to overstep his boundaries, which results in Kaname punishing him if discovered. He has also been aware that Zero is a vampire, though he did not reveal it to anyone else because he felt it would not benefit himself in anyway and because he takes no pleasure in revealing secrets.
At one point, while Yuki dealt with two day class girls who violated the nighttime curfew, he and Kain suddenly appear and Yuki becomes alert. Yuki was afraid of what they might do to those girls but Aido tells her that they came especially to see Yuki. Yuki had swung down from a tree and scraped her hands, and the scent of her blood attracted them. Aido licks the blood off her hand, and then draws his fangs and bites Yuki's hand. Then when he tries to drink from her neck Kaname appears. Luckily, the two girls fainted and were taken to the chairman to have their memories modified.
Aido is not overtly fond of Yuki and dislikes the attention that Kaname gives her, but tolerates her presence because Kaname loves her. He has difficulty showing her respect, often calling her "Yuki Cross" or just "Hey, you", but becomes willing to protect her for Kaname's sake when Kaname announces that she is to be his lover. Aido eventually develops an understanding for Yuki when she claims that she will remain loyal to Kaname, regardless of what he says or does. When Yuki is revealed to be a pureblood vampire of the Kuran line, Aido has difficulty adjusting himself to referring to her in a formal manner and frequently corrects himself.
While Aido is the only one to witness Kaname killing Shizuka Hiou, he remains loyal to Kaname and willing to lend Kaname his power in order to help find the killers of Kaname's parents. Though Kaname declines Aido's help in order to prevent Aido from putting himself in danger, Aido continues to investigate behind Kaname's back in order to discover possible enemies of the Kuran family and secrets that Kaname has hidden.
In chapter 42, he not also fought with the servants of Rido but also he encountered him and nearly eaten by him. It was thanks to Yuuki that he was saved.