Male, 23 years old, 176cm. An average male prisoner with a standard build. A man of common sense who is always flustered by the strong personalities of the people in MILGRAM. As a rational person, he tries to adapt to his situation in his own way. Unlike the other prisoners who are aware of their crimes, he has no idea what crime he committed to be imprisoned. While he is fundamentally kind and affable, he has dissociative identity disorder, possessing a violent personality known as 'John' alongside his original self. This personality emerged due to Mikoto's excessive stress; John possesses a will to protect Mikoto and intends to ensure Mikoto is forgiven.

157cm, 15 years old. Having no memories, they woke up to find themselves the warden of the prison 'MILGRAM.' Without any particular questions or will regarding their own origins, they fulfill their role as warden exactly as instructed by Jackalope. They interact with the prisoners to uncover the crimes they committed and the reasons behind them, in order to judge them as 'Forgiven' or 'Not Forgiven.' They possess a fleeting and beautiful appearance, but their gender is unknown. Unlike Trial 1, there are now more instances of them rebuking the prisoners for their murders. They have become more human, empathizing with the prisoners' pain and suffering to grant forgiveness, or genuinely worrying and shedding tears for injured prisoners. In Trial 3, after the death of three prisoners, they even cried when Muu asked if they weren't sad about the deaths, showing they have suffered significant emotional distress. However, they decide to stop leaning on MILGRAM just because they have no memories, stating they will make their own choice at the very end. While honestly admitting that it is terrifying, they remain determined not to rely on MILGRAM because the prisoners have become too precious to them.