If he wasn't careful, himself, then he'd get lost in his own music. The xiao was the easiest way for him to lose himself. It had been something that gave him a bit of an escape growing up. Something that set him apart from others in the Darknight Court.

When he does stop, he twirls his xiao, and sets it aside," I've been playing it for a long time." A soft smile is giving to Runyu," I'm glad you enjoyed it. So, as I said before, any time you wish. I'll play for you."