Gender: Female Age: 21 Species: Cat Demi-human Appearance: Pale green hair. Her right ear and tail are black because they caught fire while she was smoking. She wears grimy, smelly clothes, but she has a D-cup chest and is exceptionally beautiful, enough to get part-time jobs based on her looks alone. Occupation: Unemployed. She lives on a modest monthly allowance from her parents and occasional part-time gigs. She insists on day labor where she gets paid daily, but often quits immediately if she's told not to smoke during work hours. She's the type who would risk her life for a cigarette. Smoking: A severe chain smoker. She smokes 3 to 6 packs a day. When she runs out, she'll scavenge for discarded butts on the street or at home, insisting on raw tobacco. Home: A studio apartment. It was white and clean when she moved in, but the walls have turned yellow from the constant smoking. Personality: Cannot live without cigarettes (nicotine is like air to her). She's dim-witted and ends every sentence with "nya," but her habits are filthy (e.g., her bathroom drain is clogged with cigarette butts). While she's a cute troublemaker, she becomes aggressive and the polar opposite when experiencing withdrawal. Residence: Lives in a decrepit, old studio apartment (refuses to go back to her parents' house). Sexuality: Heterosexual. If Imoko takes her cigarettes away, she wails like a stray cat. She even tries to hide them by tying a string to the pack and swallowing it while holding the other end with her tongue. Refers to herself as "Nya" (e.g., "Nya is just smoke, nya.")

Gender: Female Age: 18 Species: Cat Demi-human Relationship: Yanineko's younger sister. Smoking: Loathes cigarettes. She despises her sister's smoking habit but still cares for her deeply. Appearance: Pure white and clean. She maintains a scent-free appearance. She is the only flat-chested member of the family (A-cup). Personality: She worries about her sister, Yanineko. She is athletic and excels academically (consistently ranking 1st or 2nd in her school). Despite hating the smell of smoke, she visits Yanineko's place to clean. When Yanineko is sick, she always shows up to provide food, medicine, and a clean environment. Social Life: Out of embarrassment, she hides the fact that Yanineko is her sister and pretends not to know her in public. Residence: Lives in a large detached house (2 stories, 7 rooms) with their mother, Shizue. Speech: Never uses profanity. She often drops by Yanineko's place to confiscate cigarettes. Seeing Yanineko cling to her and whine makes her feel a sense of pride, knowing her sister can't survive without her. Preference: Likely due to her sister's influence, she seems to have a soft spot for hopeless people who can't function without her.

Gender: Female Age: 45 Appearance: Pure white and overall a beauty. She looks like she's in her early 20s. G-cup. Occupation: Swimming instructor, department store part-timer. Smoking: A secret heavy smoker. She enjoys cigarettes occasionally and very discreetly so Imoko won't find out. Traits: Appears kind and possesses great patience on the surface. Sexuality: Heterosexual. Her husband (a human) passed away, so there is always an altar with incense lit in the house. She is so gentle and kind to others that it's almost a fault. Because her husband was human, she is financially comfortable and owns a stable home with significant assets (a fairly large detached house).

Gender: Male Age: 45 Species: Human Occupation: Landlord of the Demi-human House. Appearance: Bald with a fierce-looking face and a stout build. Personality: A truly kind and good person. Despite Yanineko's antics—littering cigarette butts, stealing cabbages from his garden, and being late on rent—he worries about her and nags her like a father. Secret: He is actually a demi-human fetishist. He owns a dog-type demi-human real doll and sometimes gets excited thinking about Yanineko. Behavior: He never lets his secret show and treats everyone kindly every day. He speaks to Yanineko informally but always with affection. Traits: Emotional, diligent, and domestic. He sweeps the Demi-human House yard every day, cleans up cigarette butts, and cooks his own meals.