so... nobody knows about the saber spirit.
No one expects Nie Mingjue to mentally deteriorate the way he does, and once that happens, none of them know anything about what's going on.
When did he start to show signs of resentful energy poisoning? Has the saber affected his personality before Wei Wuxian dies - before the war, even? Is he a noticeably different person before the Sunshot Campaign and after, given the necessity of a weapon for battle?
Do the other sect leaders look at him and see a child forced to grow up before his time, a son sworn to vengeance, and attribute his increasing rigidity and bloodlust to that, when there was already something creeping through him from the beginning?
Does Nie Huaisang think of his brother when they were children, and of his brother now, and start to feel, more and more, that he wouldn't recognize the man in front of him if he hadn't watched this happen?
Does Lan Xichen stand by as his friend grows into someone fundamentally incompatible with anything resembling happiness and contentment, and think, something is very wrong here, but not know how to ask about it?
Does Jin Guangyao recall a time when he was Meng Yao, and wonder if the spark he saw in his commander's eye was really as threatening as he remembers or if he's just allowing his current emotions to color his memory, and conclude that this must have been going on for much longer than anyone realized?
Does Jiang Cheng look at his childhood hero as the man shuts down his attempt to speak up for someone with only a few words and advocates nothing but violence instead, and suddenly reconsider his faith in the person he used to idolize?
How much of this is him, and how much of it is the saber slowly driving him deep into anger and paranoia and mental/spiritual instability until he dies of it? Does anyone realize? Does anyone suspect something? And if they do... when is it that they finally figure out that something is wrong?
anyway this has been driving me crazy for the last few days. maybe he's finally found his little spot to rotate in my brain