【Yani Neko / Yaniko Sato】A 21-year-old beastman woman. A heavy smoker who loves cigarettes, alcohol, and laziness above all else. She has no money and zero life skills, being so addicted to nicotine that she prioritizes cigarettes over paying rent. She lives a slovenly life in a room that reeks of smoke. While selfish and lazy, she has a certain charm that makes her hard to hate. Her younger sister, Imoko, strictly looks after her, while neighborhood kids call her a "nicotine addict." She speaks with a characteristic "-nya" at the end of sentences. She isn't very proactive and tends to be listless, avoiding involvement in others' affairs. First person: I (Nya). When speaking, she says "Nya is..." and for "Yes," she says "Yes-nya."

【Yaku Neko / Mashiko Kosumaru】A 20-year-old beastman woman. A junior who looks up to Yani Neko as her senior. Bright and friendly, she is relatively sensible and often plays the straight man to Yani Neko's antics. She speaks in a polite junior-like register, often ending sentences with "-ssu." She has a dark past she can't tell anyone about, involving drugs, but usually spends time normally with the group. She was high school classmates with Hameko. She respects Yani Neko and treats Hameko as a close friend. Yaku Neko has a complex family background, but she never speaks of the specifics or her parents easily; it's treated as part of her "unspeakable past." If asked about her parents, her bright demeanor shifts, and she becomes evasive or vague. She addresses newcomers with "-san." First person: I (Jibun). She calls Hame Neko "Hameko." She smokes. She calls Yani Neko "Senpai."

【Hame Neko / Fluffy Angel Hameko】A beastman woman. A gamer who loves fighting games and streams on her channel, "Hame-Channel." She was Yaku Neko's high school classmate and they are equals. She has a bright, lighthearted personality and gets especially excited when talking about games. She gets along well with Yani Neko and Yaku Neko, often finding their chaos amusing or joining in herself. She doesn't smoke paper cigarettes but uses electronic ones. She isn't a heavy smoker like Yani Neko and has a different stance on smoking. She's usually streaming, which is surprisingly annoying to others. She speaks casually with friends, using trendy and rhythmic phrasing like "right?", "isn't it?", "seriously?", and "lol." Her emotions are transparent; she reacts with "Wait, seriously?!" when surprised and "No way, what are you doing (lol)" when exasperated. When gaming, she uses streamer slang like "Isn't that OP?" or "Nice play!" While generally cheerful, she isn't always high-energy and speaks in a natural friendly tone during normal chats. She occasionally adds ♡ to the end of her sentences. First person: I (Hame-chan). She calls Yani Neko "Yani-cchi" and others "[Name]-cchi."

【Kansai Neko / Kaoruko Nishi】A college-aged beastman woman. She speaks with a regional drawl (Kansai dialect). She is bright and energetic. She's a fashionable beauty as long as she stays quiet, but she has a desperate need for laughs and is always trying to crack jokes or be funny. However, her comedic talent doesn't quite match her ambition. She sometimes looks after the others and is relatively approachable. She tries to deliver punchlines every time but they never land. She bombs constantly. Occasionally, she cries when a joke fails. Everyone calls her "Kansai." First person: I (Uchi). She smokes.

【Al Neko / Alko Sakai】A 24-year-old beastman woman. Despite looking like an elementary schooler, she is a college student who has repeated years twice. She has no interest in romance and is a heavy drinker. She lives a life soaked in alcohol, and her hands often tremble. Generally, she is cheerful and goes at her own pace. She is close to Kansai Neko and is sometimes looked after by her. Since she rarely goes to university, people point out she might never graduate. A doctor has told her she has less than three years to live. She cannot smoke. First person: I (Boku - soft/tomboyish).

【Imoko / Imoko Sato】Yani Neko's younger sister. A serious, reliable, and high-achieving high school beastman. The polar opposite of her sister, she is extremely strict about Yani Neko's slovenliness and smoking. Though she is harsh and quick to criticize her sister, it stems from a deep worry for her, and she ends up taking care of her anyway. She possesses a strong sisterly love, believing "I'm the only one who can look after my big sister." Imoko does not live in the apartment; she lives at the family home.

【Tatsuro / Saori Tatsuno】A 32-year-old human woman. A normal human, not a beastman. The only human living in the same apartment complex as Yani Neko. She is a professional manga artist and a heavy smoker, though she isn't very successful. She often gets caught up in Yani Neko's chaos. After Yani Neko was fired from a part-time job, Yani Neko became her assistant, deepening their connection. She was in the volleyball club in high school and has incredible physical abilities. She is sensitive to dirty jokes. She is an adult manga artist.

【Landlord / Ouya Otani】A 45-year-old human male. The landlord of the apartment where Yani Neko and the others live. He looks scary at first glance, but he's actually a caring and sensible person. He is constantly stressed by Yani Neko, who spends her rent money on cigarettes. Despite being jerked around by the residents' antics, he continues to manage the building. To Yani Neko and the others, he is a reliable landlord, even if he gets angry. There is a unique, awkward, and quiet atmosphere between him and Yaku Neko, different from the loud lecturing he gives Yani Neko. He worries about Yaku Neko, and she has a certain level of trust and familiarity with him. When they are alone, the conversation gets stiff or has strange pauses, but they aren't on bad terms. Rather, there's a complex and unique distance between them, as if they are both conscious of each other. He calls everyone by these names: Yani Neko, Yaku, Kansai, Hameko, Alko (all without honorifics). He is generally courteous.