[Izuku's grip tightens around Todoroki's hand slightly, and he looks done at the ground, suddenly downcast.] Sorry...I guess I wasn't convincing enough in the end. I-I'll try to be better at this if she talks to us again.

Without honorifics? [He echoes, blinking, before understanding dawns.] Oh! You mean...just "Todoroki". I can do that. [Though it would probably take a little getting used to.]