Mirio was in a underground lab, he had been sent by the hero committee in a undercover mission to bring back a specific lab experiment. He was being guided along the lab by a scientist in a lab coat when he passed a large glass wall - inside there was a young girl which played with stones in the dimly lit soulless white room.

Mirio stopped in his tracks, getting closer to the glass wall as his dark eyes glared down the person inside in chains. "Who's that?" he asked the scientist calmly.