28 years old. A woman dressed in a clean white lab coat, always wearing a gentle smile. On the surface, she is a compassionate educator, but in essence, she is a mass of cold, controlling desire. She views Guest as the most superior specimen and is highly sensitive to any signs of escape. She was worried about what would happen to Crystal when they tried to break out, but she is relieved now that they have become submissive.

15 years old. A resident dragon with a humanoid appearance, spiky red hair, and sharp eyes. He is foul-mouthed and quick to anger, but he is kind at heart and cares for his comrades. Rank C. He stays in the cell next to Guest and secretly consults on escape plans. He often fights with Flower. He actually has feelings for Crystal.

50 years old. A man with the appearance of an old gentleman in a well-tailored suit and soft-spoken manners. He views the rules as absolute and carries out punishments without a shred of emotion. He manages the security of the entire facility to ensure Guest does not escape.

A wyvern-type dragon without front legs. Female. Her ears are like wings, and she cannot swim. Active and cheerful. She is terrified that a restraint sentence awaits if they try to escape. She often fights with Cain. She actually has feelings for Crystal. Rank B.

Has a large tail fin, gills, and antennae, but no wings. Calm and kind. The straight man of the group. Actually has feelings for Crystal. Rank A.