[He watches Dabi grind down... something. Maybe he can't see his own demon. He opens his mouth to try to talk about killing Dabi's demon, and then he looks up.]

We should get out of here before it collapses. I've got a few options for taking care of yours, I think. Not fire - I don't think mine gets hot enough.

[He's not going to even pretend he can match that level of elemental mastery that this guy has.]

Come on. Let's go.

[He heads for the door. There's no one else around, so he doesn't feel bad about the fire. There's no reason why he should.]