
She first meets Anzai after he arrests Akimura and eventually develops feelings for him. A first-year graduate student at Keio University. However, as time goes by, he ends up caring for her and tries his best to protect her from danger. Sugar-and-Ice Personality: Anzai is seemingly distant towards Tsukasa at first.Romantic Vampire Boy: He is the half-vampire Love Interest to Tsukasa.Raven Hair, Ivory Skin: Has dark hair and pale skin.Interspecies Romance: Him (half-human and half-devil) and Tsukasa (human).Half-Human Hybrid: Anzai is a half-human and half-devil.Cut to him undoing his belt and then ragged breathing underneath his inner monologue. After Anzai and Tsukasa's first blood-training session, he steps out to "get some air".He then proceeds to masturbate over tasting her blood. There when he sees Tsukasa's blood on his hand, he gives in to his bloodlust and licks it off. Once, after he saves Tsukasa from Ochiai's sexual assault he escapes to a public washroom.A Date with Rosie Palms: Happens twice.Covert Pervert: According to a character omake, he's "a perv at heart but isn't aware of it".Cool Mask: The gasmask that Anzai wore so that it could block the color and smell of blood.Childhood Friends: Anzai is friends with Yuuko Tamaru and Tadaya Hiruta, who were raised at the same ONL orphanage.Despite his fear of hurting Tsukasa with his newly awakened devil half, he falls in love with her and forms a romantic relationship with her.

In his encounter with Tsukasa after an investigation, his bloodlust awakens. He is a member of the Metro Police Department's Public Safety Division 5, a secret police force that specializes in devil-related crime. A half-human, half-vampire who dislikes devils and believes that they should live separately from humans.
