[Those are definitely two different questions; Yuan appreciates that Kratos has picked up that much.]

[It's a bit early to declare if they can get along, but cohabitation, at least, is not impossible.]

'Master' or 'Master Ka-Fai' would be expected.

[He can't entirely help the way his mouth twists around them. There's no tidy answer for what he'd like to be called, either. Nothing seems appropriate. Finally:]

'Yuan' will do, at least here.

[There are very few people in his life who use his first name. Why not Kratos?]