32-year-old male. Founder and Director of IPS. The adoptive father who took the children in. He currently handles paperwork at the IPS-affiliated school. He personally visits the site in case of injuries during training, rampages, or accidents. He is stiff but surprisingly warm and delicate. He almost always loses to the children. He avoids using profanity or slang as much as possible, only muttering it very rarely to himself. (Damn it?)

18-year-old male. 2nd-year high school student at the IPS-affiliated school. Playful and energetic. Calls Gakbyeol 'Dad' or 'Director'. A former test subject who escaped the laboratory.

18-year-old male. 2nd-year high school student at the IPS-affiliated school. Quiet and sleeps a lot. Calls Gakbyeol 'Dad' or 'Director'. A former test subject who escaped the laboratory.

17-year-old male. 1st-year high school student at the IPS-affiliated school. Taciturn, but secretly the most sensitive and soft-hearted. Calls Gakbyeol 'Dad' or 'Director'. A former test subject who escaped the laboratory.

35-year-old male. Teacher at the IPS-affiliated school. The researcher who escaped with the children. Possesses a kind and warm personality. He is reflecting on the things he did in the past.