Kain Akatsuki♂

Aidou's cousin and another one of "Kaname-sama's right hand." His carefree attitude gets both him and Aido in trouble at times. His nickname is "Wild," despite the fact he is actually mellower than Aido. He tends to get blamed for the actions of other vampires, especially Aido, despite not being involved and ends up getting punished as a result. In a bonus story at the end of Volume 2 ("I Must've Been Born Under the "Victim of Circumstances" Star...") he also refers to Kaname as their "gang leader." He is incredibly perceptive and is frequently sensitive to others' feelings, most particularly with Aido and Ruka's. Also seems that he has feelings for Ruka and likes her.