[Gilles continues to smile, and whatever emotions he has, he doesn't reveal them. He also abandoned humanity centuries ago, so it's unlikely his emotions now are the same as a human's. Which may be why they take the form of shadows within the shadows.]

Oh, but it would be the stubborn cave dwellers that present an obstacle to those of us on an errand.

[He doesn't have any real reason to antagonize her, as he could easily go around, her, but... she's interested him, a little.]

You're the one who seems suited to the dark.

[And he turns up his own bluish light, which in no way affects the emotional shadows looping around him.]