Fortunately, Xemnas is not likely to be any immediate threat. Quite the contrary, in fact. Any danger that he brings with him is the sort that is potential danger. The kind that doesn't really care about how many people must fall on the way to his true goals. But that isn't what he shows to Jay. Instead he offers his very best impression of curiosity.

"What manner of trouble would that have been?"

If Jay is paying attention, he's speaking the same language that Even and the rest of the people from his universe have been speaking but it's... unhurried, somehow. As if he will get to where he means to get in his own time and the rest of the world can simply deal with it.