Xichen blinks slightly, pausing for a moment, but covering the freeze of surprise with the fluidity of his motions.

Cupped hands again, Xichen considers the possibilities, his voice growing slightly less... familiar, though not colder.

"Please forgive my error. The train does tend to bring people who are similar yet different.

"I would ask if the Sunshot campaign never happened, or had a different outcome than the one I know, but I believe the courtesy name you have would be different then." He would probably be named by his own parents, for example. "Beyond that, I can only hope that your world is a kind place."