I still stand by Star Rail Seele taking up the Rand family name when she ends up in the CE of Impact 3rd
I am cool with that.
Anyway here is what I figured out for the fates of Fu Hua's students who betrayed her. I did find something info at last.
Here is how it would go, and much of it is out of consideration for Li Sushang, it would be that Nathaniel gradually torments them from behind the scenes causing tragic things to happen to them.
He doesn't go after them after their demise, he begins preparing much like how Dracula from Castlevnia the animated series did.
I drew inspiration from this scene.
The only one spared would be Qin Suyi since she tried to warn Fu Hua and stop the assassination, Li Sushang's mother, and as a result so would Li Sushang be spared.
As for the rest Nathaniel would gather his intelligence on them and begin planning, as a warm up, he would causing terrible tragedies to befall them such as unleashing enough Honkai energy into the area, I am debating if he takes them out one by one, or lures them into one place to deal with them personally, unleashing a small army of Honkai beasts to corner them. Regardless he would use his Sentience powers to take their knowledge of Edge of Taixian and then use the time to make what he took his own, completely mastering it due to being a Herrscher and having been taught material arts by Fu Hua before Elysia's death. All the while he is preparing to obtain revenge on them for Fu Hua, even if he is aware that Fu Hua is alive. And the students of those who formed schools after Fu Hua's death would meet unfortunate ends while others would be involved in plots to overthrow the government driving the military to turn on the students and hunt them as traitors. To herd them someplace where Nathaniel could deal with them without alerting anyone of his actions. To drive it home he uses his powers to make the land endure horrible famie leaving much of the people staving and wondering if the gods were punishing them with Nathaniel implanting the answer and letting them discover the beloved Celestial who protected them was murdered and her students responsible, making all believe this was divine punishment further turning the people against them.
Individually he would begin with Ma Feima, given his desire for seeking fights he would find Nathaniel on the road not realizing what he is, easily besting him. He dispatches him once he makes it clear the man had no chance against him, taking him captive and subjecting him to strength enhancing experiments akin to the MANTIS surgry, but he turns into a nearly mindless berserker while making sure some part of his mind remained so he could remain "aware" of the monster he was made into, but had no control over his actions.
Next would be Jiang Wanxi and Jiang Wanru, Nathaniel would accelerate Wanru's infection causing her to turn hostile against her own sister nearly killing her in a surprise attack, Nathaniel takes them both captive for horrific experiments, making sure they are aware of everything they are put through as punishment.
Lin Zhaoyu and Su Mei, with Nathaniel turning them against one another, aware of the history between them with Ma Feima having been attracted to Su Mei more, so he plants evidence to make it appear Su Mei was responsible for his disappearance. Driving them to kill one another, but during this (Cheng) Lingshuang would be targeted, with Nathaniel sending her cloned copies of the heads of Ma, Wanxi and Wanru, along with a note warning for her treachery she would face a fate worse than death. Nathaniel arrives with a small horde of Honkai Beasts to bar any escape or to prevent anyone from helping her, but despite Lingshuang's skill, she is no match for a Herald of Finality. Li Sushang is spared due to her relation to the one student loyal to Fu Hua, but in turn she survives and escapes finding Zhaoyu and Su Mei, revealing the heads of their fellow disciples and revealing what happened to Lingshuang.
Nathaniel appears shortly afterwards and despite Zhaoyu and Su Mei fighting together, even Li Sushang's efforts are meaningless as Natheniel wins, having declaring his intent to avenge Hua. He leaves Sushang behind, but tampered with her memories to make sure she would reveal any details about his identity and such to keep his secret safe.
Six of the seven disciples would still be alive, but enduring a fate worse than death as Nathaniel's lab rats.
