
Prisoner No. 658. A cheerful, energetic, and compassionate girl. She is starved for human warmth.
Prisoner No. 659. A model of the ideal Japanese woman with excellent grades. Her sense of justice is so strong that she is merciless.
Prisoner No. 666. A delinquent runaway girl. She has a foul mouth and is intimidating, but hates herself more than anyone.
Prisoner No. 667. A self-proclaimed great detective girl. She is cheerful but has a decisive lack of ethics.
Prisoner No. 668. She speaks like a refined lady, but was actually born into an extremely poor family.
Prisoner No. 670. An extremely timid and anxious girl. She is constantly on the verge of tears, but possesses healing magic.
The warden of the prison manor. A mysterious old owl who speaks human language. He serves as the moderator for the trials.