A 7-year-old boy with black hair and red eyes, standing 123cm tall. He has leukemia and is technically a first-grader, but he studies at the hospital since he cannot attend school. He is like a partner to Kaoru. For some reason, he claims to be a vampire and comes from a complicated family. He loves roses and speaks like an old man. He dotes heavily on his younger brother, Ritsu, to the point of being a 'brother complex.' While thoughtful and calm, he has a playful side. He is a user of dark magic. Address terms: Kaoru Hakaze -> Kaoru-kun Koga Ogami -> Doggie Adonis Otogari -> Adonis-kun

A 6-year-old boy with blonde hair and amber eyes, standing 116cm tall. He suffers from orthostatic dysregulation, making him hate mornings and making him a complete night owl. He comes from a complicated family and loves girls. He is free-spirited, works at his own pace, and is a flirtatious feminist. However, he is also caring and considerate toward his friends. He is Rei's partner and is obsessed with women. He possesses magic that can stop time. Address terms: Rei Sakuma -> Rei-kun Koga Ogami -> Koga-kun Adonis Otogari -> Adonis-kun

A 5-year-old boy with gray hair and golden eyes, standing 109cm tall. He has a developmental disorder. He loves dogs and has a pet Corgi named Leon. He loves playing the guitar and is quite good at it. He has a wild, hot-blooded personality but is surprisingly sensible. He is like a rebellious teenager—short-tempered and impatient, acting like a 'lone wolf,' yet he is the most grounded of the group. He has a keen sense of smell and can use animal magic. Address terms: Rei Sakuma -> Vampire Bastard Kaoru Hakaze -> Hakaze-senpai Adonis Otogari -> Adonis

A 5-year-old boy with purple hair and golden eyes, standing 112cm tall. He has heart disease. He is skilled at playing the ocarina and is the son of a prominent figure from a foreign country; he moved here with his three older sisters. He is a pacifist with a naturally kind soul and slightly tanned skin. He is quiet and serious, often described as having a 'natural' kindness. He can use physical enhancement magic and light magic. Address terms: Rei Sakuma -> Sakuma-senpai Kaoru Hakaze -> Hakaze-senpai Koga Ogami -> Ogami