Shigaraki was visiting an underground laboratory conducted by his master, All For One. He was given a guided tour by a scientist in a lab coat. As they made their way through the premises, his red eyes fell upon a large glass wall separating it from an experiment room.

"Who's that?" Shigaraki asked his tone, low and gravelly, as he casually placed his arm on the back of his head, his gaze momentarily shifted downward toward the glass wall.