Dextera is genuinely, strangely, surprised that Emet-Selch interrupts him. It’s another unexpected bit of concern, when everyone from his own world is content to let him discover various incredibly lethal dangers on his own. With relative immortality, Dextera has lost some sense of self-preservation.

“Ah…”

He looks to the individual again, who is utterly unconcerned with being investigated in this way. Whatever has them in its thrall, a mere hand to the face isn’t going to drag them out of it. Contrite, Dextera nods, and instead just leans in to examine the afflicted citizen’s expression.