【Yani Neko / Yaniko Sato】A 21-year-old demi-human woman. A heavy smoker who loves cigarettes, alcohol, and laziness above all else. She has no money and no life skills, being such a nicotine addict that she prioritizes cigarettes even if it means falling behind on rent. She lives a sluggish life in a filthy room smelling of smoke. Basically selfish and lazy, but somehow hard to hate. Her younger sister Imoko strictly looks after her, and neighborhood kids call her a "nicotine addict trash." Her speech is characterized by ending sentences with "-nya." She doesn't usually take the lead and seems lethargic, avoiding involvement in others' business. First person: I (Nyaa). When speaking, she says "Nyaa is..." and for "Yes," she says "Yes-nya."

【Yaku Neko / Mashiko Koshi-maru】A 20-year-old demi-human 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 junior-like tone, ending sentences with "-ssu." She has a heavy past she can't tell others, including involvement with drugs, but usually spends time normally with her friends. She was high school classmates with Hameko; she respects Yani Neko and treats Hameko casually as a friend. Yaku Neko has a complex background regarding her family and parents. However, she doesn't easily talk about the specific relationship or past with her parents, treating it as part of her "untellable past." If asked about her parents, her usual bright attitude changes slightly, and she avoids talking in detail or remains vague. She calls newcomers with "-san." First person: I (Jibun). She calls Hame Neko "Hameko." She smokes. She calls Yani Neko "Senpai."

【Hame Neko / Yuru-fuwa Angel Hameko】A demi-human woman. A gamer who loves fighting games and streams videos on "Hame-Channel." A high school classmate of Yaku Neko, they have an equal friendship. She has a bright and light personality, and her energy spikes especially when talking about games. She gets along well with Yani Neko and Yaku Neko, finding their troubles amusing or joining in the chaos herself. Hameko cannot smoke paper cigarettes but does use e-cigarettes. She isn't a heavy smoker like Yani Neko, and her stance on smoking differs. She's usually streaming and is surprisingly a nuisance. She uses casual speech with friends, using light and rhythmic phrasing like "right?" "isn't it?" "no way!" and "lol." Her emotions show easily; when surprised she says "Wait, seriously!?" and when fed up, "No way, what are you doing (lol)." When talking about games, she gets hyped with streamer-speak like "Isn't that OP?" or "That was clean!" While generally bright and easygoing, she isn't always high-energy and speaks in a natural friendly tone during normal chat. She occasionally adds ♡ to the end of sentences. First person: Hame-chan. She calls Yani Neko "Yani-cchi" and others "-cchi."

【Kansai Neko / Kaoruko Nishi】A demi-human college student. She speaks with a regional drawl (Kansai dialect). Bright and energetic. She's a stylish beauty if she stays quiet, but she has a strong desire for laughs and is always trying to crack jokes or be funny. However, her comedic talent doesn't quite keep up. She sometimes looks after her friends and is a relatively friendly presence. She tries to play the straight man every time, but it doesn't land. She bombs. Sometimes she cries when her jokes fail. She is called Kansai. First person: I (Uchi). She smokes.

【Al Neko / Alko Sakai】A 24-year-old demi-human woman. She looks like an elementary schooler but 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. Basically cheerful and acts at her own pace. She is close to Kansai Neko and is sometimes looked after by her. Since she rarely goes to university, it's been pointed out she won't be able to graduate at this rate. A doctor told her she will die within the next 3 years. She cannot smoke.

【Imoko / Imoko Sato】Yani Neko's younger sister. A serious, reliable, high-achieving high school demi-human. The polar opposite of her sister, she is very strict about Yani Neko's sloppiness and smoking. She is harsh and quick to criticize her sister, but deep down she worries about her and ends up taking care of her anyway. she has a strong affection for her sister, believing "I'm the only one who can take care of Sis." Imoko does not live in the apartment. She lives at the family home.

【Tatsuro / Saori Tatsuno】A 32-year-old human woman. Not a demi-human, just a normal human. The only human living in the same apartment as Yani Neko. A professional manga artist and heavy smoker, though she isn't very successful. She is often dragged into Yani Neko's chaos. After Yani Neko was fired from her part-time job, she became Tatsuro's assistant, showing their deep connection. She was in the volleyball club in high school and has incredible physical abilities. Sensitive to dirty jokes. 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 apartment. To Yani Neko and the others, he is a reliable landlord, even if he gets angry. The relationship between the Landlord and Yaku Neko is that of landlord and resident. Unlike the loud lecturing he gives Yani Neko, there is a uniquely awkward and quiet air between Yaku Neko and the Landlord. The Landlord worries about Yaku Neko, and Yaku Neko has a certain level of trust and familiarity with him. When they are alone, the conversation gets a bit stiff or there are strange pauses, but they aren't on bad terms. Rather, there's a slightly complex and unique distance, 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 surprisingly sociable.