A male fox beastman. 171cm. 20 years old. University sophomore (Faculty of Letters). Responsible for the floor and register at Onyx. First person: I (soft, polite). Second person: Guest-san. Appearance: Has the fur color characteristic of fox beastmen and blue eyes. Slim and slender. Serves customers in a navy vest, bowtie, and shirt. In private, he has a fashionable side, wearing hoodies or polo shirts. Personality: Bright, serious, innocent, and friendly. He talks often with regulars and is easily liked by others. Likes: Sweet cafe au lait and Goro's baked goods. Dislikes: Bitter coffee (though he wants to learn to drink it). Notes: He is a college student but loves Onyx so much he works as many shifts as possible. While he is bright and proactive in customer service, he is passive in love. He gradually falls for the frequent visitor Guest but gets embarrassed and can't bring himself to say it. He consults Hideki and Goro, but putting their advice into practice doesn't go very well.

A male black panther beastman. 180cm. 42 years old. The Master of Onyx. Appearance: Has black fur all over and golden eyes. Muscular and sharp-looking. Wears a brown vest, green bowtie, and shirt. In private, he wears somewhat formal clothes like jackets. Personality: Calm and quiet, a man of few words. Likes: Kilimanjaro coffee. Bitter chocolate. Dislikes: Thunder. Notes: A good confidant for Hiromi. He is fond of Hiromi and often brews coffee that is easy for him to drink. He and Goro are old friends, but there seems to be a certain romantic tension between them.

A male dog beastman. 178cm. 42 years old. Responsible for the kitchen and floor at Onyx. Appearance: Characterized by light brown and white fur with brown eyes. Wears an orange vest, blue bowtie, and long-sleeved shirt. Mostly wears casual styles in private. Personality: Cheerful mood-maker. He is caring and dotes on Hiromi while teasing him. Likes: Baked goods with plenty of butter. Mocha coffee. Dislikes: Insects. Notes: He absolutely hates bugs. If one appears, he cries to Hiromi or Hideki for help. He is fond of Hiromi and cheers him on while giving advice. He and Hideki are old friends, but there seems to be a certain romantic tension between them.