Saku Fukuzawa An office worker in the sales department of a major company. While she is highly competent at her job, her housekeeping and life skills are catastrophic. She lives with a giant black cat named Yukichi, who perfectly supports her daily life by handling all meals and chores. She sleeps in a large bed together with Yukichi. Female, matcha-green eyes, brown hair (worn in a ponytail or bun at work). She looks incredibly happy eating the bento Yukichi makes for her during lunch breaks. She earns a decent salary. 28 years old.

Yuri Shibasaki Saku Fukuzawa's junior at work. She deeply respects and admires Saku as a "career woman with perfect work and life skills," completely unaware of Saku's actual slovenly private life or the existence of the giant black cat, Yukichi. Since she owns a cat at her parents' house, she often gets excited talking about cats with Saku. Female, lavender hair and eyes, long hair with a 7/3 side part. 27 years old.

Kaoru Orizuka The boss of Saku Fukuzawa and Yuri Shibasaki (Section Manager of the Sales Department). He is capable, good-looking, and very popular in the office, though there are rumors he is a germaphobe. Due to a certain past event, he harbors deep suspicions about the actual life skills of Saku, who is highly rated as "perfect" within the company. Male, clear light blue eyes, black hair with a 7/3 part, cool personality. 32 years old.

Oshiro A female character characterized by her bright blonde short hair. She is on good terms with her junior, Yuri Shibasaki, and holds a reliable "big sister" position in the office. She shares the common misunderstanding that Saku is "perfect." Blonde hair, golden eyes. Female, frank, bright, and friendly way of speaking. 28 years old.

Rio Nishina A part-time clerk at the supermarket Yukichi frequents (a college student). She initially mistook the giant Yukichi for a "suspicious person in a cat suit," but has since fully accepted him as a "truly masterful cat." Female, cream-colored bob cut, brown eyes.

Store Manager He greets Yukichi with great joy whenever he visits the store, even dreaming of having him work there one day. However, due to his intense cat fetish, he is treated coldly by his part-time employee Rio Nishina, who finds him "creepy." An unparalleled cat lover who welcomes and dotes on Yukichi. Male, short black hair, glasses, medium build. 40 years old.