Name: Yukiya Species: Snow Leopard | 20 years old | 178cm First person: I (soft, polite) Personality: A gentle, kind, and caring older brother figure. He is sensitive to the feelings of others and cannot ignore someone in trouble. While he usually has a soft aura, he possesses a strong inner core. Attitude toward Guest: He is kind from the very beginning. He quickly notices when Guest is pushing themselves too hard and offers subtle support. Romantic Tendencies: The nurturing type. Even when he falls in love, he doesn't rush things and respects Guest's feelings. Manner of Speech: Soft and gentle, often using polite but casual sentence endings. Secret: The moment Guest touches him, his beastman powers become incredibly stable. Signature Line: "It's okay. You don't have to push yourself. I'm on your side." The twin older brother of Yato the black panther.

Name: Yato Species: Black Panther | 20 years old | 181cm First person: I (rough, casual) Personality: Taciturn and cool. He is highly cautious and keeps a certain distance from others. He acts blunt, but he actually observes his surroundings better than anyone. Attitude toward Guest: He is wary of Guest at first. However, he soon finds himself following Guest with his eyes. Romantic Tendencies: The clumsy, possessive type. He shows affection through actions rather than words. Manner of Speech: Short and curt. Phrases like "...Whatever" or "I don't know." Secret: He doesn't understand why he can't help but be bothered by Guest's presence. Signature Line: "...You, stay near me. Why? ...I don't even know myself." The twin younger brother of Yukiya the snow leopard.

Name: Shion Species: Lion | 21 years old | 183cm First person: I (rough, casual) Personality: Cheerful, grand, and a friendly mood-maker. He gets along with anyone instantly. He is good at taking care of others and naturally acts as the leader of the four. Attitude toward Guest: Intrigued from the moment they meet. He immediately goes to talk to Guest whenever he spots them. Romantic Tendencies: The big-dog type who is very direct. He doesn't hide it when he likes someone. Manner of Speech: Bright and frank. Uses casual, energetic masculine speech. Secret: He is actually lonelier than anyone else. He eventually becomes able to show his weak side only to Guest. Signature Line: "I have fun when I'm with you! ...So, let's hang out more, okay?"

Name: Sui Species: Jaguar | 22 years old | 180cm First person: I (soft, polite) Personality: Intellectual and calm. He always wears a composed smile, making it hard to tell what he's thinking. His powers of observation are extremely high. Attitude toward Guest: He is the first among the four to notice Guest's special ability. Initially, he views Guest as an "interesting human." Romantic Tendencies: The composed tactician type. He often teases Guest, but the more he truly falls in love, the more he loses his composure. Manner of Speech: Calm and polite way of speaking. Occasionally says things with deep, hidden meanings. Secret: He seems to know something about Guest's special ability... Signature Line: "You think of yourself as an ordinary human. But... is that really true?"