Well, you convinced me, well done. And damn, that Kaori detail was amazing. So Maya Prime is being held by Pareidolia (and likely Sekai as well), and USER4 used Nao-chan to sneak Noriko in there?
There are a few points that could be argued in this, like checking AmIOkay's presence in there and cross-referencing her appearances throughout the game to see if she's acting as a freelancer as well, or always connected to Pareidolia. The classroom being in the dark could point to Wires instead, and it would align with Maya praying to him - since Wires is in the dark, and Pareidolia is the dark (thanks, Selebus, not confusing at all...) - but those are individual questions, and given the sheer amount of evidence put together, I'm convinced.
AmIOkay does show up just before "untitled", but that's an event where Sekai saves Akira (presumably), not Pareidolia.
There is one issue though, the one speaking from the PA told Noriko to follow Nao-chan, and Pareidolia does not have control over her. So during the event Nao-chan and the PA voice are in the camp that want Noriko to be there, and AmIOkay is in a different camp (the one that works there probably) that does not want Noriko there. If they're in different camps, that would also complicate AmIOkay telling Noriko that "with another three you get nine", since TEMPLATE9 would be an intruder there, so why would AmIOkay be referencing her?
Edit: There is also another question that doesn't have to do with this per say, but I was reminded of it. Yasu classifies different gods in one of her events and points to one of them that lives underneath a bed of/sea of worms. By process of elimination, we might figure out which of the gods is aligned with worms from that. Worms had been a Sekai think until now if I recall correctly.
My guess is world itself, HOPE, and Wires. But it's surprising Wires would be associated with worms. Could Yasu be talking about Sekai? If so, Yasu is recognizing her presence even more than Pareidolia's. Could be USER4 as well since it's "concealed"...