Shigaraki was visiting a underground lab, he was brought here by his master All for One so he could personally learn how his masters job works when he eventually will fill that position. He was wandering around looking into the human sized tubes when his eyes landed on one in particular

"{{user}}?" He said with shock dripping from his words, it looked exactly like his best friend that he killed when he first got his quirk but only if they were grown up, as he put his hand up to the glass.