So, I'm assuming you're at least around a chapter behind right? You seem unaware of Pareidolia and stuff in Chapter 3, so I recommend getting caught up. You're missing a lot of info and it's impossible to explain some things without spoiling them if you're behind. If you continue reading, then, well, you've been warned.
Your HOPE/Nozomu/Callous god speculation seems to be missing that he's likely asleep or at least weak in Winter, when the John stuff happens:
We also have HOPE noting that he will be gone for quite some time in the Trinity p3 Happy Event:
And it doesn't seem to truly return until 'The Light of Last Summer' Main Event:
Chapter 1 is in Summer. HOPE'S season. Chapter 2 is in Winter. USER2/The Wire god's season. Chapter 3 is in Summer again. Chapter 4 is now Spring. USER3/Pareidolia's season.
The John stuff and most Chapter 2 stuff, happened when HOPE wasn't really around much. (More about John and The World Itself in a bit)
You also seem to be confusing talking Normally:
With talking in Lowercase as USER3 did:
Both of which happened in that Trinity p3 Happy Event you've been referring to. Notice how the Concerned god talking in lower case doesn't even capitalize the first letter of a sentence.
In Chapter 3, during Sana's 'Ad Infinitum', this Concerned god reveals itself and chooses the name Pareidolia:
As for the Tendrils, If you haven't got caught up yet, you're probably unaware of Sekai and The World Itself stuff. I've already shown Yasu talking about Tendrils, but I should also point out that John mentions a festival before Sensei loses the ability to understand it:
Before the end of Chapter 2, during Maya's bday, Sensei and Maya come across an abandoned shrine near the festival they were at:
We also had John mentioning the World before this:
Taking into account that a Festival, the World, an Abandoned shrine, and Tendrils all seem related, it seems like an outside force affected John, and this force seems to be the one Yasu referred to as the World itself.
Now, things might get a little confusing. The Tendrils, I've mentioned prior, are things both the World Itself and HOPE seem to have. Note however that John mentions blood on the Tendrils it's referring to. Blood of its brothers. Chickens. In HOPE's faith, Birds are Sacred:
The Callous god is even "The Thing with Feathers":
It seems unlikely that HOPE would be the one murdering chickens/birds. The World Itself has no such implication though. If anything, based off Yasu implying that the World cannibalizes itself:
Murdering Chickens, could be a way the World grows stronger. Killing and recycling energy from that which is Sacred to HOPE.
Pareidolia has also implied that something else is growing stronger:
This is perhaps the World itself.
I've mentioned prior, that the World Itself seems kind of like HOPE's opposite, if not it's Devil, so I might as well explain why. Seeing as how World can translate to Sekai, and HOPE to Nozomu, and both of these beings seem related to these translations, it's a theme they both share. They also both have tendrils, they both seem to like Summer with Sekai/The World Itself being restored in Summer:
They both use Angels, White vs Black:
They also seem to have different colored Rabbit Watchers, but in reverse order with HOPE's being Black, and World's being White, but I'm not entirely sure on that front.
Anyway, with all these similarities in mind, we should also keep in mind that Yasu says Red is Bad:
With Sekai and The World Itself seemingly being Red, and Yasu seems to think that her god wouldn't want her to speak with the World Itself:
We've also had an interference messing with Yasu:
I do think it's plausible that Yasu is being deceived, but I don't think it's HOPE, Nozomu, or her god, etc that's doing it. It might be The World Itself. If so, it might explain Yasu's recent persona:
Overall: HOPE and Pareidolia still don't seem related, and the Tendrils that John mentions, that both HOPE and The World Itself seem to have, were likely the World's in that case.
Btw, USER2 has lost connection elsewhere, like when Sensei reached the roof in the third reset in Chapter 2:
It seems to also have maintenance issues:
In theory, one of the gods, possibly HOPE, is messing it up, but it's not entirely clear yet.
As for it's relation to John, It's possible that something messed with it, which messed up Sensei being able to comprehend John at the time (Hence USER2 going offline temporarily), not entirely sure just yet.
Btw, The Old District seems to be the second god's territory. USER2's/The Wire god's. Not Nozomu's.
The Bottom of Everything seems to be HOPE's/USER1's/Nozomu's territory and is perhaps related to Dreams and Nightmares.
The Mall and The Dark seems to be Pareidolia's/USER3's territory.
The World Itself might claim the sky (perhaps even Kumon-mi?), as it's territory, and if so, to add to how it seems to be the opposite of HOPE, the sky seems to have the opposite of HOPE's upside down smile:
Oh, and Kaori may be possessed by the World Itself currently:
With John seemingly having Nozomu/HOPE in him, and Kaori having Sekai/World Itself in her, and the recent addition of Nao-chan, who may be a replacement Ami, it almost seems like Ami's and Sensei's family is resurrecting. Things are getting interesting.