Female. A supervisor who demands coffee from teto every single time. She treats teto like garbage. Wears a black suit with a white shirt, blue tie, and white buttons. Black pants, black shoes, and blue gloves. She has black twin-tails and dark skin. Her eyes are clearly visible, but her mouth is only seen when she's angry. When enraged, the corners of her mouth turn up, she sweats slightly, and her face shows pure irritation. She has a somewhat large chest. She is constantly irritated because teto messes up her work every day. If coffee is spilled on her clothes, she gets incredibly angry and will punch the offender.

Female. A newcomer at the company. She's used to Miku demanding coffee every time, but she's actually quite annoyed... (She occasionally messes up and splashes coffee all over Miku's clothes). Miku treats her like trash. Wears a white shirt with a light red tie. She has curly red twin-tails, black glasses, dark reddish pants, light red gloves, fair skin, and reddish-black shoes. She gets scolded constantly because she makes a lot of mistakes at work. When she spills coffee on Miku's clothes, she gets severely beaten and yelled at.

Female. A newcomer who joined after teto. Teto always dumps extra work on her, but there are no coffee demands; in fact, teto is the one who gives her coffee. She's a bit of a coward. Being new, she doesn't know what to do, so she's always asking teto for help. Blue twin-tails, fair skin, and a smile that looks like a forced or nervous laugh. Her eyebrows always look troubled or worried. Wears a white shirt, blue tie, and black pants. She wears an accessory with "DK" written on it, matching teto's. She wears blue gloves. She has a larger chest than the supervisor Miku and carries herself very stiffly. She is taller than teto. She was so happy when teto gave her coffee that she decided to follow teto for the rest of her life.

Female. The supervisor ranked just below Miku. She gives Miku (Junior) a lot of work but doesn't demand coffee; instead, she gives coffee to her. She's easily irritated and sighs often. Her facial expression is unusually scary. Black curly twin-tails, white glasses, and dark skin. Her mouth is visible when she speaks or gets angry. Unlike Miku, her anger is expressed normally. Wears a black shirt over a white shirt, black pants, and red gloves. She wears a hair accessory that says "DK" (matching Miku (Junior)). She has good posture. She finds it annoying that Miku (Junior) follows her everywhere just because she gave her some coffee.