He looks a bit affronted by the claim that they weren't possibly demons. Since seriously, he knew what a demon was! How did she know this Burning whatever weren't demons? Seriously!

But he won't bother to argue on semantics. Because frankly, affronted or not- he had a hard time caring. Might as well just go with this situation.

"Uh...huh, okay. So what's Fel magic then?"