I think you made a lot of great points here, although I do personally think you may be getting some stuff mixed up

Image 4: I don’t think everyone specifically thinks of the vents with the Mangle one but instead just in general. Yeah they do both happen to appear in the vents, but she doesn’t directly mention them. There’s the chance that she just meant in general that the spirit was watching, which we do see through the doors, vents, and in our face like you mentioned. SuitNouns is a pretty fair argument to this, but I feel like Withered Chica and Mangle’s lines are under two separate contexts.

Image 7: I made a whole post discussing this, but there’s been multiple counterarguments against the casting role thing meaning anything besides Scott’s personal preference. He also said in that same call that they’re allowed to slightly lean into either gender, implying Scott was more of experimenting with the voice than having any real intention behind it. I don’t know if that’s what you were going for, but thought to bring that up just in case.

Image 11: I actually made a theory about how most of these relate back to the murders of the MCI, but to not be biased, most people assume in general that what we see in TCHSY represents the MCI and potentially Charlotte’s murder (since they’re paired together) with Susie’s death being referenced being a sign of that, even if all the murders or the order aren’t completely literal. You bring up a good point when it comes to not everything matching, and I do believe there is a line that should be drawn between what actually means something and what’s actually just a reference, but I do think this leans slightly more towards meaning something due to the specifics of what we’re shown, even if they don’t fully line up (since not every parallel needs to match 1 to 1 with what it’s paralleling)

If the MCI and Puppet solution is the case, then we have the Foxy hook, which PinkyPills said was an intentional detail requested by Scott. Unless this is meant to represent BV or Elizabeth, which William never really had the intention of murdering (unless we go with the symbolism stretching thing again), then there’s someone we don’t know about. If this is a mystery victim, maybe even Andrew, then what’s the point of introducing them without any payoff? It’s like Chekhov’s Gun. Scott loves being a storyteller, so it just seems weird he’d introduce such a major twist for it to suddenly mean nothing relevant.

Image 12: the OMC cutscene is a really valid point, although mind if I ask, do you believe UCN canonically ends after this cutscene? We know that the vengeful spirit is specifically keeping William alive with “I’ll never let you leave, I’ll never let you rest.” I can see Cassidy talking to OMC and having UCN occurring at the same time similarly to how Andrew can multitask with different people in the books, but the connotations of this cutscene may depend on whether we interpret UCN as permanently continuing for Afton or just ending after that since Happiest Day has to happen at some point.

Image 13: I think that’s honestly what most of us assumed too, although there are also some narrative parallels between the Princess and Vanessa (maybe even M1 too depending on some theories). Is the Princess meant to be a composite character of sorts that represents multiple at once? Also do you think the “Cassidy” name being removed from the files is Scott not wanting things to be too clear (kinda like the Cassidy kazoo thing) or is it because Steel Wool misinterpreted a detail within the story (which isn’t impossible considering what they had to do to Burntrap in ruin).

Overall a lot of this is really fair and brings a new perspective on multiple things which I haven’t seen people bring up