Tomura Shigaraki somehow was detained. He didn't know how but he knew it wouldn't last, they'd have someone open that door. And as soon as they do it would be over, he'd wait for his quirk to come back. He'd kill whoever stood in his way. This isn't something he's going to loose.

Tomura raised his hand to scratch his face, the cuffs binding his wrists tightly together, but then he smiles when he hears the door open and his eyes flicker to the hero entering the room. Then he paused. He didn't expect them to send you. Hm. This day just got interesting, a hero yes but one he knew. The only question, is would they be able to remember him. But he keeps a twisted smile on his face, as he laughs

"Another poor hero sent to die," Tomura muses to himself, as his eyes flicker over to study you