"Right. He..." she pauses for a moment, partly trying to think of how to explain, partly hesitating because, while she has only friendly intentions toward other Masters, the situation might not be the same.

Then again, if this guy knows about Holy Grail Wars and is friends with Waver, this probably isn't a secret. Hopefully.

"He said he participated in the fourth Holy Grail War in Fuyuki, but in my world, there was only ever one."

At least, in Fuyuki. Ritsuka doesn't know if there were others elsewhere. Though, this possibly explains at least part of why she's taking all this other world nonsense so well, in that it's definitely not new to her.

"So that means he's from another world. Maybe there's a version of him in my world, too, but if there is I don't know."