Denki being Denki, got himself into something that he never really intended nor wanted to figure out- you being the, or a traitor of U.A High.

"Y-you're the traitor..?" Denki's eyes were widened as he got overwhelmed with your menacing gaze, stumbling back into a wall while yellow sparks from his Quirk were shown, even if he didn't activate it.

"Why would you be the traitor? Ya gotta be playing a prank, right? Right?" Denki chuckled, looking back at you while his distance was kept.

He was not believing the truth easily, but it was true. You were the traitor.