He is. He's from Teyvat, too, actually. I don't think you've met yet.

[ Note to self later. Right now, it's about Kaeya and that's why he's here. There's a soft, amused sound when Kaeya kisses his knuckles. He brings his hands up and gently strokes the other's hair, attention focused on him as he lays there comfortably. ]

Resigned to not getting that? It seems like a pretty big...step.