There's a lengthy pause. Not as long as a minute and a half, but the silence stretches. For a bit, she is stuck in place, just looking at the pathway Sennara drew with her gesture, trying to figure out -

But, see, the thing is this: she has no reason to not trust her. Sennara has worked with the Riftwatch, and has been stuck down here with them, and is more importantly quite capable - in comparison to Hermione, who still fumbles even on a good day, and who almost started off a fight by waving her wand around in a dwarf's face.

Of course Sennara climbed up already to find more Blight. Of course.

"You can see in this darkness?" Implied: Better than me?