one of the things I think is rly interesting about the usher kids' deaths is that there's a clear linear pattern in how much influence verna has on the way they die, starting with virtually no influence and ending in a death 100% orchestrated by her.

like okay. perry's death? completely his fault. the only influence we see verna have on him is in her attempts at convincing him to call off the party and not blackmail people. the acid was already in the tanks, he made the negligent decision to hook up the tanks to the water system without testing them. if he'd never met verna, the party would have gone on exactly as planned and he would have died via acid rain anyways.

then there's camille. her death is similar to perry's in that there's a clear cause -> effect of her breaking into a lab full of chimps hyped up on adrenaline -> being mauled by a chimp, but there's also little hints at verna's interference. camille talks to verna right before she dies, its implied via the photo she takes that the chimp that killed her appeared to her as verna for a moment, and there's also the question of how the chimp got out in the first place. yes she probably would have died in this manner anyways based on her own decisions, but there's slightly more of a direct influence from verna than perry got.

with leo, we know that him initially killing pluto was a hallucination thanks to his drug use, but I get the impression that everything that follows is a blend of verna messing with him and further drug-induced hallucinations. the pet store he visits is actually an abandoned building full of rats that verna alters his perception of, and his visions of her in his apartment definitely feel more verna-induced than drug-induced, yet there's also kind of the implication that all the stuff with the hammer leading up to leo's death is drug hallucination-related. we also see verna appear to him multiple times; she's not just a single mysterious figure at a party or a lone security guard, she's now running a store and coming to his house and talking to him on multiple occasions.

vic is similar to leo in that her death is caused by a slow descent into madness, but the way in which this plays out is directly caused by verna. yes vic was planning on going forward with human trials, but verna is the one who shows up and poses as a test subject. there's still ambiguity when it fully comes to the question of supernatural influence, and verna's insertion into vic's life was more specific than leo's but also broad enough that its reasonable to argue that things might have played out the same had she not been there. would everything with ally dying and vic spiraling have played out the exact same way if the human trial had happened later, or if another test subject had showed up? maybe, but the actual course of events that transpired only happened because of verna's direct influence on them.

but tammy was terrorized for weeks by verna before she died. verna shows up as a replacement escort, then continues to show up in the background of tammy's life. she shows up in her apartment, appears to her in a supernatural-ish way at the goldbug launch, and when it comes to tammy's actual death she's in there fucking with her through the mirrors. I guess you could argue that she still wouldve gotten super paranoid over the launch and maybe started to hallucinate the original escort following her? but unlike the rest of them (except vic, who I feel also falls into this category), her death doesn't feel like it would have necessarily played out the exact same way it did had verna not been there. she only dies because she smashes a mirror that verna is taunting her from.

and then finally frederick, who didnt get a choice (not that he deserved one), verna steps in and 100% causes his death in a very specific way that wouldnt have happened had she not directly interfered with his life.

and then you look at the fact that the siblings died in reverse order of age, which is also in the order of shortest amount of time spent as a member of the usher family to longest, and the fact that the two who objectively had the most interference from verna in their respective deaths were the only two who were actually alive when roderick made the deal..... idk I feel like there's something there.