Wei Wuxian shoots up the ladder as surely as he could scramble up a steep slope, forgetting all his cultivation in that moment. The werewolf that'd lunged at them is repelled by Sizhui, yelping and provoking an answering yelp from Wei Wuxian, who has now managed to get himself on the platform higher above, wrapping his arms around the tree's trunk as if that secures him further from the ones below.

Which it does, in some sense, but it leaves Sizhui with the not very helpful call down of, "Don't let it learn to climb, Sizhui!" As if that's something reasonable to worry about, or reasonable to be done.