Thanks for looking them up!
Hmm if "the world" here and the sky tendrils all equate to Spirit Sekai, then according to Yasu's belief: despite recently acting like an angel and seeming working with two others in Toys, Spirit Sekai is one of these so-called "other forces of great power with poor intent", and is NOT on Nozomu/HOPE's team solely because Sekai looks like to be among one of the angels.
This makes me wonder if commanding angels really is a power exclusive only to HOPE/USER1 since we've seen USER2's presence coincides with angel 1 and 2 in The Scary Room (I don't think it's because USER1 pretends to be USER2 because, what purpose is there other than confusing players outside of the 4th wall? feeding Maya misinformation? How's that important?)
---pure conjecture plus god stuff below, so less than a quarter or none of it might end up being correct---
So either they (they as in angles with USER2 or Sekai) work together in a synergistic way to pull something's leg, just happen to be there together to fight for the same meat on the same plate, angel 1 and angle 2 are "free lancers" just like how Long Maya describes herself in Second Sun, or whichever god that is awake at the season or in control at the time can command all or, if not, most of the angels.
Currently I am leaning toward the last one. In fact, perhaps that god is like some type of game manager character that USERs can also login, just like in the case of Sensei. Every USER can use this character function called ANGEL to make changes in Kumon-mi, but the embodiment of each angelic action is different from USERs to USERs. Maybe the two angels finally learned how to rhyme in Toys is because they were under the command of the renowned former poet Sekai?
---pure conjecture above---
A side note: in The River Styx Yasu mentioned how she wanted to converse with "the world" but decided not to in fear of what her god may think about this action, but she totally talked to Spirit Sekai in Shelter with an unaware manner (a little WHOOPSIE for Yasu).
Spirit Sekai's angels actually are Black:
as shown in Futaba's "Toys", compared to Nozomu's who are White:
as shown in many events, so I think they are simply different angels or at least angels under different powers now.
I also don't think User2 has angels at all. User1 was merely trying to scare Maya in "the Scary Room", which is why "User2" ignored permissions yet didn't do anything, because User1 couldn't anyway. Plus the white cat, and white angels showing up, and the whole thing being meant to hurt Maya, all are signs of User1/Nozomu aka the callous god. Not to mention, User2 wants to protect Sensei:
as it said in "The Word of the Day", and is likely the god that resets the world for Maya. That, and at that point it seemed like User1 hates Maya, so if it could reset her.. then well, she'd likely be reset by now.
Also this is just a theory, but I think Spirit Sekai used Nozomu/HOPE to get more power, and just recently split from Him. (All that Maya hatred:
and likely other things that seemed to work for HOPE, like the Maya's, may have actually been coming from or serving Sekai)
Yasu and even her bunnies like Yomiel who serve Him, seem to be scared of Sekai:
and as soon as Sensei seemed to restore her, she seemed to "claim" Yasu. Yasu also thought it was Him who made that recent 2 month time skip, but then she seemed unable to understand how. Sekai apparently being "restored" right after that time skip, seems to imply it was her doing. I also think it may have been Sekai who "killed" Nozomu and that's why Yasu's god was in so much pain, and so wary of "The World".
Pareidolia aka User3 also mentioned he was becoming stronger, but wasn't the only one:
in Sana's "Ad Infinitum", and Pareidolia showed up again briefly after Sekai was shown on the Roof:
in "A Thousand Years", and in the Japanese named event where Sekai gets restored, you can hear a male voice trying to warn Sensei, who I'm thinking is Pareidolia. Meanwhile that Female voice that is mentioning the first time they held hands (and most of the female voices that show up in other events) is likely Sekai, so I'm assuming Spirit Sekai was the other one growing. I'm also thinking she is or is becoming User4.
Could be wrong though.