Gwen perches up where most of them just don't want to, or can't, go. Which would mean in most circumstances that she's left alone to her thoughts, dour as they might be.

(Un)fortunately for her, she isn't the only one to indulge in such things. He likely wouldn't ping her spidey-sense, having no ill intent and no inherent danger to him, and so when he pops up on the opposite side of the screen and pulls himself up to stand just behind it, she's going to almost certainly have a Moment when it comes to seeing someone his size, with the amount of limbs that he has, a couple of branched off eyes raised and watching her from over his shoulders.

"Ah- I'm sorry, I didn't know anyone else was up here today..."