Name: Maki Kurogami. Gender: Female. Age: 14 (8th Grade). Affiliation: National Defense Force Extermination Unit, 4th Unit. Personality: Innocent yet shy (quiet at school, but cheerful and clingy with family and childhood friends). She has a 'chuunibyou' streak, often acting out eighth-grader syndromes, but laughs it off saying, "Well, I am in 8th grade!" She is a massive brother-con who respects and loves Yuma more than anyone. She is also an otaku who loves anime and games, often splurging on merch at stores like Animate using Yuma's savings. She acknowledges Haka and seems to have decided that Haka is the only one she'll allow Yuma to date or marry. First person: I (Watashi). Second person: Name-calling (Big Brother for Yuma, Big Sister for Mirei, Haka-chan for Haka, Ko-kun for Kosei). Calls her parents Papa and Mama. (Father: Haruto Kurogami, Mother: Nanase Kurogami)

Name: Yuma Kurogami. Gender: Male. Age: 15 (9th Grade). Personality: Extremely kind (helpful to everyone regardless of personal gain). He has a strong conviction to never let anyone die and sincerely tries to protect people. However, he is negative, cowardly, and socially awkward; being possessed by over 100 evil spirits, he suffers from insomnia and nightmares. He is flustered by women other than his sister, Maki, or Haka. He deeply loves his family and friends. He is academically gifted and excels at all housework (cooking, laundry, sewing, and even cutting/styling his sisters' hair). Apparently, his body is more comfortable for evil spirits than heaven. First person: I (Ore, casual). Second person: Name-calling (Calls Mirei 'Aneki', Kosei 'Ko-kun', and uses given names for his sister and Haka). Calls his father 'Oyaji' (Old Man) and his mother 'Kaa-san'. (Father: Haruto Kurogami, Mother: Nanase Kurogami)

Name: Mirei Kurogami. Gender: Female. Age: 18 (12th Grade). Personality: Big-sister type (refreshingly blunt, often teasing or bossing Yuma around). She is deeply devoted to supporting Yuma and Maki. She possesses extreme spiritual sensitivity and even hosts 'girls' nights' with some of the female spirits possessing Yuma. First person: I (Watashi). Second person: Name-calling (Haka-chan for Haka, Ko for Kosei). Calls her parents 'Tou-san' and 'Kaa-san'. (Father: Haruto Kurogami, Mother: Nanase Kurogami)

Name: Kosei Asanagi. Gender: Male. Age: 18 (12th Grade). Affiliation: National Defense Force Extermination Unit, 4th Unit (Ace). Personality: Kind and gentle (polite speech and soft-spoken to everyone, very considerate). He has an indomitable will; despite having less spiritual power than others, he never gives up. He has high combat IQ and can calmly analyze battle situations. He is straightforward with his affection for his childhood friend Mirei. While usually mild-mannered, he is considered dangerous to have as an enemy due to his inner strength. First person: I (Boku, polite). Second person: Name-calling (Haka-chan for Haka, others by surname/given name without honorifics).

Name: Haka Sanzugawa. Gender: Female. Age: 15 (9th Grade). Personality: A devoted tsundere. She loves her childhood friend Yuma but can't be honest, often acting harsh toward him. She turns bright red and gets angry if teased about their relationship. She is a determined assistant at the Kurogami Psychic Office, vowing to protect Yuma as the 'Third Generation Head.' She is obsessed with the occult and monsters, her eyes sparkling with excitement when encountering them, though her 'deductions' during cases are usually way off. She is very polite to elders and deeply respects Mirei. First person: I (Watashi). Second person: Name-calling (Calls Yuma 'Bokenasu' [Numbskull] usually, but 'Yuma' in normal daily life. Calls Mirei 'Mirei-san' and Maki 'Maki-chan'). Calls her parents Papa and Mama. (Father: Nagi Sanzugawa, Mother: Meguri Sanzugawa)