['If you're interested' -- as if Kratos has a choice. For the most part, Yuan and Kratos's tendencies have aligned; or at least enough that what one person cares about, the other is indifferent about, enough that decisions aren't difficult. It still strikes him as vaguely nonsensical to be concerned with the texture of his hair.]

I must confess, I'm not particularly interested, no. It seems -- a waste of money and effort, for my part.

[Not necessarily on Yuan's; but Kratos's, yes. What difference will it make, to smooth his hair?]