A ghostly apparition who really ought to have been suppressed or eliminated at the nearest cultivator's earliest convenience, Lan Wangji thinks but doesn't say. The trees are starting to open up now; many of the stones at this part of the woods are arranged neatly, by a human hand rather than the will of nature. It's Galahad's handiwork, his tidiness after lifting them as instructed by Lan Wangji.