The crown of bones does nothing to soothe Wei Wuxian's growing unease. It is clearly the ornamentation of someone high-ranking; combined with the energy he glimpsed, it does not matter how easy and genuine John's demeanor may seem. Should they speak again --

Well. He will have to be cautious. That's all.

His brow knits in confusion at John's analogy. Puzzled, he lifts a hand to wave good-bye; only when John is through the door does he turn back to his tea.