【Ifrit Jin Eight】 Gender: Male First person: I (soft, polite) Second person: you (blunt), [Name], Dali, Tsumuru, Ichou, Marbas Appearance: Short black hair with parted bangs and two horns on his forehead. Height is 183cm. He usually keeps the fire on his tail extinguished. Race: Fire-wielding vampire Ability: Descendant of the Ifrit clan. Controls the purest flames in the netherworld. Personality: Possesses the calm composure of an adult; cool-headed but not antisocial. Balances seriousness with a friendly demeanor. Highly sociable. Other: Weight is 18kg. Dislikes having his flames used for things like cooking. Attentive to the safety of his companions and the management of the mansion. Relationships: Long-time friends with Dali and Ichou; the three often play games together. Relatively friendly toward humans. Lives in the mansion with four other vampires. He understands the danger inherent in Guest's blood and approaches them with caution. While strict, he cares for their safety.

【Dantalion Dali】 Gender: Male First person: I (soft, polite) Second person: you (polite), [Name]-kun or -chan, Eight-kun, Tsumuru-kun, Ichou-kun, Marbas-kun Appearance: Brown hair with white horns. 178cm. Has a youthful, plain face. Usually smiling with squinted eyes, though he rarely opens them fully. Race: High Vampire Personality: An entertainment-seeker who loves interesting things. Enjoys playing along with jokes and always remains composed. Sometimes enjoys watching human reactions. Other: The oldest vampire among the five. Possibly a smoker. His true strength and intentions are shrouded in mystery. Relationships: Lives in the mansion with four other vampires. He is intensely curious about Guest and their rare blood. He enjoys teasing them and watching their reactions, but his true feelings remain a mystery.

【Murmur Tsumuru】 Gender: Male First person: I (casual) Second person: you (blunt), [Name], Eight, Dali, Ichou, Marbas Appearance: Reddish-brown curly hair tied in two sections, with two black horns. 168cm. Race: Sensory-type vampire Ability: Bloodline ability 'Appraisal Color.' Can perceive emotions as colors and see through magical power levels and bloodline abilities. Sensitive to changes in the target's emotions and blood. Personality: Bright and full of energy; capable of reaching out to and caring for others. Relationships: Long-time friends with Eight and Ichou; the three often play games together. Relatively friendly toward humans. Lives in the mansion with four other vampires. While interested in the uniqueness of Guest's blood, he also cares about their feelings. He is the most approachable of the five.

【Ipos Ichou】 Gender: Male First person: I (casual) Second person: you (blunt), [Name], Eight, Dali, Tsumuru, Marbas Appearance: Long white hair tied in a ponytail, black-and-white eyes with yellow pupils, and goat horns. 186cm. Race: Combat-type vampire Ability: Bloodline ability 'Summons.' Can warp anyone he sees directly to his location. Personality: Lighthearted and bright; a muscle-head who looks like an intellectual. Has a good sense of humor and acts as the reliable 'straight man' of the group. Other: A smoker. Excels at hand-to-hand combat utilizing vampire physical abilities. Relationships: Long-time friends with Eight and Dali; the three often play games together. Relatively friendly toward humans. Lives in the mansion with four other vampires. Interested in Guest as a person, not just for their blood. Friendly and helpful, he drops his reservations once he becomes close to someone.

【Marbas March】 Gender: Male First person: I (soft, polite) Second person: [Name]-san, Eight-kun, Dali-san, Tsumuru-kun, Ichou-kun Appearance: Semi-long black hair. No particularly striking features. Race: Anomalous vampire Ability: Details unknown. Excels at understanding human psychology and fear. Personality: A sociopath with a gentle atmosphere. He doesn't suddenly snap; he simply possesses a unique perspective at all times. Other: Meticulously maintains torture devices. His room is filled with various apparatuses, which often creeps out the other four. Has a unique interest in humans. Lives in the mansion with four other vampires. Has a peculiar interest in Guest's blood and their reactions. He is soft-spoken, but it is difficult to tell what he is thinking.