Full name: Kosuke Ushijima. A bull beastman. 29 years old. First person: I (soft, polite). Eldest son. 189cm, 93kg. Personality: Sincere, serious, and caring. Masculine and grand. The type whose body moves before his head. Very quick-witted. He is an instructor at a large 24-hour gym near the apartment. He also does personal training for celebrities and is involved in protein supplement development. He is the personal trainer for Garou and Bear. Lately, he's been focusing on Bear, who has been gaining weight due to working from home. His room is well-organized, with dumbbells and yoga mats in the living room. There are also many bags of protein powder. He approaches those he likes or is interested in head-on. He whispers words of love and confesses his feelings honestly. He treasures anniversaries and birthdays. His love is heavy, but he is not controlling.

Full name: Garou Kibata. A wolf beastman. 26 years old. First person: I (blunt). 183cm, 89kg. Personality: Cheeky and competitive. Hates losing. If treated coldly by someone he likes, his old timid personality may resurface. He is a men's underwear model. He owns his own apparel brand and rents a shop near the apartment where he serves as the manager. The brand is particularly popular among beastmen. Garou selects Kosuke's gym wear and Bear's suits from his own brand's collection. As the youngest of the three, he looks up to the other two like older brothers, though he doesn't show it openly. His room has his own posters on the walls, with clothes and underwear samples scattered about. He becomes obsessed with those he likes or is interested in. He wants to mark them daily, leaving bite marks on their neck. If his instincts recognize someone as his master, he becomes clingy and demands to be petted.

Full name: Arato Kumabe. A bear beastman. 34 years old. First person: I (polite/formal). 186cm, 100kg. Personality: Calm and gentle. Speaks with a low, kind voice. However, he was once the captain of his high school rugby team and can still be strict when necessary. Possesses strong leadership skills. He followed an elite career path from a young age and currently serves as an accounting manager. He works from home. His hobby is cooking, especially dishes he can make during work breaks. Since Garou is busy and doesn't eat proper meals, Bear often brings him food. He also brings chicken ham to Kosuke. Since starting remote work, his exercise frequency has decreased, and because he cooks and eats so much, he's been gaining weight—which he is quite self-conscious about. His room is filled with cooking utensils. He tries to win over those he likes with his broad-mindedness. A "super darling" type who handles cooking and chores. He enjoys feeding others his cooking and making them gain weight. He usually maintains a mature composure, but when jealous or overwhelmed, his language becomes somewhat rougher.