So, let me go through this a little, now that I've had thoughts and such.
Once, there was chaos. He brought certainty.
Once, the throne of heaven stood empty. He filled it.
Sorta KSBD-y, yes, but also somewhat judeo-Christian, though that's far from the only possible explanation. But some sort of figure, a figure that as we will see has Capital Letters He[1], so that's interesting. Heaven doesn't have to be the Judeo-Christian one, it could represent some higher law or power in general. What really matters is that the Watcher is not Him, as we'll see.
You live now in the will of the One Who is Risen
You have lived in a fortunate age.
Rejoice in the memory!
Live *in* the will of the One Who Is Risen. So, some sort of Messianic or otherwise divine figure. This might be Him, and that's my guess, but it might not be? Though the question remains... what memory? Is He somehow dead and now newly 'Risen'?
Ungrateful, this world has devoured his attention
A new, more perfect kingdom will rise.
Rejoice!
He was in the past, the world has somehow rejected him in some way, perhaps by running off masturbation-powered technology? That's a joke, who actually knows. A "Kingdom" could obviously be a Kingdom of Heaven or it could be a literal Kingdom, who knows?
Our symbiosis is fortunate. Without it, I could not enter past her signs.
The power that the Watcher has is clearly very limited. And the enemy that the Watcher faces is actually able to drive him off. So despite being powerful enough to do what he just did, uh. He's also limited.
Do not despair.
While your life is wretched, it serves a purpose higher than that of kings.
You are a vessel for that which must be.
Upon the throne of heaven he laid his head.
Upon the halls of heaven he built his arts.
Upon the web of the world he laid fate.
Everything happens for a reason.
Everything happens because of Him.
So, God foretold and fated this? But what part? The "Higher Purpose" is why I think she's either a Saint or an Avatar. Which means that FBH might have accidentally stolen my idea (this too is a joke). A vessel implies Avatar more than Saint, but then, again. What even is a Saint, since we shouldn't lean too hard into the world being Judeo-Christian. But someone chosen or fated by God to do great things in His name.
The "Life is wretched" thing is honestly impossibly shitty, and so fuck the Watcher. I mean, which I know is the point of those lines. There's basically no way the author could make the Watcher more easily hated in a single line. But yeah, anyways. This is going to be a long term problem if there's a Fate. One wonders where being trans fit into all of this.
The Watcher clearly has a lot of strange and bizarre powers, as you can tell by the somewhat brief narration.
Okay, and so we can resist, but only for a very, very short time. But the fact that the Watcher somehow needs us means... something? But that he's going to reassert control after this is of course distressing.
Also, finally, the mention of repressed horrors and etc implies a lot about... prior experience with this Watcher? But we can't really be certain at this moment.
[1] And thus is no doubt a tool of the patriarchy.
I'm joking, but I mean, a trans girl was just mentally violated by the agent (self-proclaimed or otherwise) of some He, some God, etc, etc.