Personally for Aymeric, he wants to know why Ryou joined. Obviously something happened to make him think as such; he doesn't seem to be the type to want to watch the world burn for funsies. Besides, his expression gives away his true feelings: words mean shit when your actions contradict but he's more polite in his observation. Who is he, Estinien?

He still doesn't condone the actions Ryou and his comrades have done, especially when children were a part of the group they hurt but he wants the entire truth behind it all.

But he will wait with him until the white robed shinki show up if they ever do. And probably stick another tissue up his bloody nostril, first one's probably a little soaked up. And by tissue, we mean more torn up under yukata pieces.