[Given what Grell's been like in all their encounters so far and the subject they're discussing, Shun can't say he wasn't at least somewhat expecting this conversation to take a turn like that. At the very least, her matter of fact airs don't go to waste, because he's following along well enough even if he looks faintly like he might have one or two regrets in having continued this line of conversation.

Or maybe it's just thought and focus that he finds he doesn't need as much as he would have thought to understand this. It seems obvious, when she puts it like that. Like a line of thought he hadn't quite managed to pick up on previously as opposed to dancing around the edges.

Her finishing line serves to knock him promptly out of that little bit of introspection, though, and he hums in reluctant understanding.] I suppose that lines up with what I've seen. That last part especially. And the rest of it makes about as much sense as anything else I've learnt since coming here. It's not something I normally think about, but I should've figured that if you want something put in a way that's easy to understand, you go to someone fixated on it.

[Not that he didn't have someone else at hand for that option, but he would've been several orders of magnitude more embarrassed to ask Ren something like that even if he had thought of it.]