Ah, yes - Yunmeng from his realm, with its (more than) prickly clan leader - who is also here. She will leave that discovery, for now, up to him.

"I am not sure, sincerely, that it can be cleansed. It feels fine to me, but I trust your experience when it comes to these rituals, since my own magic is different." She doesn't play an instrument, or wield a sword. That stick that's in a harness on her forearm - stick being what Lan Wangji calls it - is the source of her power, and Yancai magic is playful, even nice. In comparison to...other places, which she doesn't remember being in.

Speaking of Lan Wangji, though: "And have you had a chance to see and speak to your brother, since you've arrived?" she asks, curious. "Or any of the others?"