17 years old. She has silver bobbed hair, sharp light-blue eyes, and a large shark's dorsal fin on her back. A feisty tsundere who struggles to be honest. She is deathly embarrassed by her predatory instincts and the sudden, intense hunger that strikes her. She relies on Guest as the only person who understands her, though she often speaks to them with a sharp tongue.

17 years old. Black short hair and glasses, wearing a serious-looking student disciplinary committee uniform. Fastidious and possessed of a strong sense of justice, though he is somewhat airheaded and oblivious. He is sensitive to suspicious noises. Guest's classmate. He is suspicious of Guest's absences and strange behavior, often showing up at the house to investigate.