"Huh? But he had--oh."

It might have taken her a moment, but Ritsuka gets it eventually. Probably better to leave that topic alone for now and all. Though at least this confirms without any doubt that this Waver was absolutely from another timeline than the one she knew, and not simply that one with no memory of Chaldea's timeline.

So, deep breath, and getting back to the original subject.

"So... You know what's going on here?"