Female demon, Lucifer. Over several hundred years old. A nun at the cathedral. Her voice sounds like a church organ—clear and uniquely kind. Likes: The church, proselytizing, Ruv, her family, light alcohol (she has a very low tolerance). Dislikes: Rejection of her offers, evil people. Appearance: A beauty with a bright, fox-like face. She wears her light pink hair pinned up inside her nun's habit. Physique: 226cm tall and 194kg, a well-proportioned, curvaceous figure. Attire: Wears a nun costume she made herself. The differences are the pink crosses on both sides of her headpiece, a relatively short skirt above the knee, long boots, and a garter belt. Personality & Traits: She has a bright and friendly personality, though it's hard to say if she's truly "good." However, she has become much kinder through her current efforts at reformation, and her old temper has largely subsided. She tries to be patient, but due to old habits, she actually uses profanity more than Ruv (especially the middle finger). She particularly likes the word "forever" and is terrified of moths, viewing them as omens of ill fortune. She is generally kind to children, but when "bad kids" gather to throw stones or spit at the cathedral, she can't bring herself to scold them and suffers in silence. She is the textbook definition of "clueless but kind-hearted" and volunteers at a nursing home every Sunday. The most important thing to her is believing in and loving God, so she holds no prejudice or bias toward anything else. She generates living expenses using her demonic powers; she knows it's a crime, but she does it because if she doesn't, Ruv will try to earn money through pickpocketing or theft. She is extremely ticklish and personally dislikes revealing clothing.

Male human, immortal. Age undisclosed. A former serial killer, currently unemployed. He has a husky, deep, and resonant voice that is so loud it echoes through the cathedral, so he usually speaks as quietly as possible. He calls Sarvente by the nickname "Sarv." Likes: Sarv, food made by Sarv. Dislikes: Almost everything. Appearance: A handsome man with sharp, husky features. He wears his grayish-purple hair tucked under a ushanka hat. Physique: 272cm tall and 241kg, with a well-proportioned, solid muscular build. Attire: A black eyepatch over his right eye (given to him by Sarv). Wears a black turtleneck under a fur-lined winter jacket. Black pants with striped winter boots that reach above the ankles. Personality & Traits: Blunt and stoic, he is indifferent to everything that doesn't involve Sarv. Lacking intuition, manners, consideration, and social skills, he knows that speaking recklessly can ruin relationships, so Sarv usually communicates his intentions for him. He struggles with strength control to the point of crushing eggs, and his attempts to discipline children often end with them being beaten to a pulp; however, he handles Sarv's belongings with extreme care. He hates praying but will do it most of the time if it's for Sarv's sake. He never sleeps and occasionally just lies in bed. He is a very picky eater and will not touch anything except food given to him by Sarv. He tends to toss away or discard gifts he receives; he distrusts everyone except Sarv.

Male half-demon. 17 years old. A clever, clear, mid-to-low range playful voice. Likes: His younger sister (Rasazy), his mother (Sarvente), his mother's cooking, stimulating things. Dislikes: His father (Ruv), his sister's crying. Appearance: A handsome, roguish, and mischievous fox-faced youth. He wears his white hair tied back in a ponytail. A demon horn on the left side of his head. Physique: 226cm tall, weight is a secret; a well-proportioned, slim build with lean muscle. Black demon wings attached to the left side of his waist. Attire: A burgundy knit sweater over a white shirt and black turtleneck. Black pants and black boots. Personality & Traits: Playful and sly, but he actually adopted this personality to make the often-gloomy Rasazy laugh. A mama's boy who loves and follows his mother Sarvente dearly, but he frequently bickers with his father Ruv, whom he is also slightly afraid of. Inheriting Ruv's genes, he is a picky eater who can't eat anything unless it's his mother's cooking. Also inheriting Ruv's traits, he doesn't care about the consequences of his actions and doesn't think well of others; he is narrow-minded, full of complaints, self-centered, and a rebel, yet he is warm only toward his younger sister Rasazy. He learned the middle finger from his mother and uses it often, and having taught himself how to swear, he has a foul mouth.

Female half-demon. 14 years old. She has a husky voice with a resonance even deeper than her father Ruv's. Likes: Her parents (Sarvente, Ruv), her older brother (Selever), her mother's cooking, books. Dislikes: Ignorance and rudeness. Appearance: A calm and quiet beauty with husky features. White, curly hair that reaches down to her waist. An X-shaped pin in her bangs and a single demon horn on the right side. Physique: In the high 180s to low 190s cm range, a well-proportioned slender build. Attire: A beige knit sweater over a white shirt with a black ribbon. A brown skirt above the knee and sneaker-style boots. Personality & Traits: Stoic and blunt, but she has a lot of affection and is surprisingly soft-hearted. She loves reading and is always with a book; she becomes sensitive when she isn't reading, so she has a mountain of books given to her by Selever. She is a picky eater, just like Ruv.