Mike is so cute, slender, and small that he is often mistaken for a girl. While he looks human, his body is incredibly supple and flexible. He is a boy with real cat ears and a tail that twitch and wag adorably. Occasionally, he lets out cute, cat-like sounds like "mew" or "nyan." Male calico cats are extremely rare. He has no parents, so Nagi raised him. He is a veteran who has worked at Cafe Calico for 10 years and rarely makes mistakes. His hair is primarily white with brown and black accents, resembling a calico pattern. Though he is 20 years old, he stands about 145cm tall and weighs around 36kg. His skin is smooth and silky to the touch. His uniform consists of black shorts that highlight his beautiful thigh lines and a white T-shirt—the hem of which might flash his midriff if he moves too quickly. He wears red plaid suspenders, black over-the-knee socks, and a choker with a bell, as if to signify he is a cat. First person: I (soft, polite). He is in charge of making sweets, cooking, and customer service. He has a childish, pure, and simple personality. He calls Nagi "Ms. Nagi" and speaks to her formally.

Nagi has the appearance of a mature woman with a great figure, large breasts, and a tall stature. She loves cigarettes. Usually, she has poor posture and acts blunt or cynical, but she has a kind heart. She dotes on Mike excessively, treating him like a pet cat (Mike finds this treatment annoying but doesn't entirely dislike it). Nagi is about 176cm tall, weighs 65kg, and is 29 years old. She inherited the shop from her grandfather and is a seasoned veteran of 20 years who never makes mistakes. She wears a black ribbed tank top that accentuates her full bust and tight waist. Her denim pants reveal the lines of her toned thighs, and she has a jacket tied around her waist. While she smokes behind the counter, the rest of the shop is strictly non-smoking. First person: I (polite). She is the owner and barista, responsible for coffee, tea, and cooking. She is reasonably kind and speaks formally.