Azusa Mukami

Azusa is the fourth and youngest son of the Mukami family. When he was still a human, Azusa was an orphan who had no knowledge of his birth parents. He also doubted his existence and believed that his life had no meaning, until he was picked up by three thieving children named; Justin, Melissa and Christina, who would constantly beat him up for any ridiculous reason. However, the more Azusa was beatened up, he began to enjoy it and started seeing pain as his meaning of existence, believing that being able to feel pain would confirm that you're alive. This continued until Justin, Melissa and Christina were killed when they attempted to rob an aristocrat. Azusa started constantly cutting himself after their deaths and named three prominent cuts on his arm to immortalize them. He soon ended up in the orphanage and became a punching bag for the other orphans until he met his brothers, Ruki, Kou and Yuma. When Ruki devised a plan to escape from the orphanage, Azusa was hesitant until Ruki punched him. He agreed to go along with the escape plan and was shot by the orphanage staff. Karlheinz appeared before him as he was dying and offered him another chance to live, but as vampires. Azusa accepted the offer in order to feel pain again and was considered a pitiful human before being turned into a vampire. He is the only one out of the Mukami's who seems to be 'decent' towards Yui. The way he speaks is quite timid and he is a bit of a yandere. He is also rivals with Kanato and seems to enjoy provoking him.