King Eliam, of the Door Within. He is God, pure and simple. He's slightly different from the God of the Bible in that he exists in only one person, rather than three.

In fact, as a bit of backstory, He sent Agent Alleb to HQ, so He definitely knows about it. I doubt anyone will need to know about Him, though; there were fewer than fifty DW Trilogy badfics the last I checked.

1/ We don't really need to think about things we're not actually writing missions into. ^_^

2/ Canon-cloaking. The canon itself stops canon characters noticing us; there's no reason it shouldn't apply to omniscients.

3/ SEP fields. Unless your omniscient explicitly pays attention to everything (rather than just having the ability to know about it), an SEP field should render agents unnoticed.

4/ Canon self-repairs after a badfic is dealt with. Lots of characters don't need neuralysing at all; they just have the events wiped from their personal history. Dying characters will get back up and move on; uncanonically-alive characters will spontaneously die. You should really need knowledge of alternate timelines to get around this.

5/ Practical omniscience =/= true omniscience. Any method of omniscience that isn't simply They Just Know By Magic is spoofable by the PPC.

6/ 'And then dark gods tore a dimensional rift into HQ and slaughtered everyone inside' isn't funny. The PPC is a humour series. Rule of Funny should be consulted over and above precedent and logic.

hS

And the Outer Gods, since they're actually different things. The vast majority of Lovecraftian horrors are not omniscient; they are more like unstoppable forces than sentient beings. They don't really get involved with humanity except to destroy them. The two major exceptions that I can think of would be Yog-Sothoth and Nyarlathotep.

Yog-Sothoth very explicitly knows and sees everything. He would definitely know about the PPC. That being said, he's not in a position to do anything about it due to being sealed outside of reality (although that didn't seem to stop him in "The Dunwich Horror.")

Nyarlathotep, on the other hand, is not omniscient. He is, however, much more involved with humans. More specifically, he likes to drive them insane. He is treacherous, cruel, and yet profoundly charismatic. Nyarlathotep acts as the emissary of the Outer Gods, of which I believe Yog-Sothoth is part of. So… he could possibly know of the PPC. That could be a very bad thing.

PC, amateur Lovecraft scholar

And, indeed, could be shorter. (Jack Harkness? Why?) Usually, these are reserved to those who are truly Omnipotent. YAHWEH, Aslan, Death, and so on. Due to having complete omnipotence in their job description, it is a little difficult to make them say, "except this." So, instead, we make a plea to their better nature and hope they wont go blabbing about us. They seem to have kept their word thus far.

However, I would make an argument about certain other canon characters who are not on the list. Relax, they are not fourth wall breakers. You can see how I think they go below. Indeed, I don't even go with the argument of, "But they are gods, so they must know, because they are deities!" Unless total and complete omnipotence is in their list of powers, they can be neuralized. Is it harder? Possibly. But it can, and will, be done.

In my view, the "Recorders of Fate" or "Keepers of Forbidden Knowledge," may very well have some old tomes relating to the Protectors of the Plot Continuum. The biggest one is, for me, Hermaeus Mora: Daedric Prince of Forbidden Knowledge. He resides in the plane of Oblivion known as Apocrypha. Here, in the vast, unending library, resides all knowledge of all reality. whether mortal man or immortal god was meant to know any of it, it matters not, only that it be recorded within this maddening realm. To those who wish to seek it, grand power and inspiration lies within. But, be weary traveler, for within resides monstrous beasts and tormented souls who have lost their sanity and selves in the ever eternal quest for knowledge. But, beyond the physical dangers within the Eternal Library, be most afraid of that which you seek. For glancing within the wrong book without the proper mental wards can shatter even the strongest willed of minds.

In my view, Herma Mora is effectively Omnipotent. It is his job to know all things. Even better, with C0DA*, my view is true! In my C0DA, Hormaius Mora knows every dirty secret of the PPC, and how it all works. He knows how to find the Pool. He knows the exact layout of HQ. He even knows how Legal works. He will simply never tell anyone. He is far too interested in seeking new knowledge (of which, there is never ending, yet, non-existent) and impressionable, desperate minds to break and bend under his control. So, if ever an agent should see a pitch black book in HQ, it is best to send it directly to the Library, without ever glancing within. For your safety, and every one else's.

As for any other recorders of forbidden knowledge, you can make the argument that they have it within their library, somewhere. But what librarian is expected to have their entire stock memorized? Again, anyone other then Herma Mora.

(No, I have not misspelled Hermaeus Mora once in this post. He has a number of spellings. The proper one? Such knowledge mortal man is not meant to know.)

(*C0DA is something... special for the Elder Scrolls canon. While it does not stand for anything, I like to say it unofficially stands for: Canon Open; Do Anything! It is complicated, but I will gladly go into it if anyone is interested. However, yes, it also stands to reason that in your C0DA, Herma Mora knows nothing of the PPC, and have it be just as valid as my insistence that he knows everything. All I can do is try to convince you to adapt my C0DA as your own.)

As in, most likely do not know of the PPC simply because they haven't heard of them. However, most are also so reality breaking, I would assume a memory-erasure or something would have, to quote Worf, "No Effect". brain chemistry or eyballs mean very little when you can tell the laws of physics to shut up and go sit in the corner.

Thus, I would assume agents would try to avoid interacting with them. I know I would! Although, if I were some unpronounceable otherworldly entity of evil, I really wouldn't care about the strange, insane kids who run around killing the sparkly people either, so maybe the Great Old Ones do indeed know of the PPC, they just don't care. Or have some feeling resembling apathy. Actually, it's probably best not to think too hard about this one.

I had Coyote from Gunnerkrigg Court know about the PPC because, well, because he's Coyote. He's capricious as a fairy from an old, old story and as powerful as a god can be. He knows how to mess about with memories to a far more detailed degree than a neuralyser can manage. And lastly? If someone tried to mess about with him? He'd put up a fight.

That's not a fight an experienced agent team would have a snowball's chance in a blast furnace of winning, and it was Wobbles and the Notary's first (and to date only) mission. =]

Waaaay back in Ye Olden Times, Cthulhu was used as a popular method of Sue murder. He was phased out because... well, the REAL OOC reason was because it was an over-used death, but the In-Universe reason was because he was getting fat - so I assume that Cthulhu, at least, knows about us.

I'm fairly sure that Bill Cipher from Gravity Falls knows about the PPC. Unfortunately he's probably the reason that I am leery of writing a mission in that universe - it seems like Agents would be too good a target to pass up, but I have no idea how that would play out other than 'badly.'

"...there are a few canon characters who know of the PPC. These characters may be omniscient, like Aslan or Eru, or otherwise impossible to neuralyze, like Death or the Bronze Dragonflight; or they might simply have a talent for knowing things they shouldn't, like Gaspode."

Neither Discord, nor The Great Old Ones, enter on any category. They aren't omniscient, nor are embodiments of Time, Death or Memory. They aren't known for knowing things they shouldn't know either. Pinkie Pie on the other hand...

As far as I know, the only beings that know of the PPC are either God or His analogue (i.e. Aslan from Narnia, Eru from Middle-earth), or are everywhere in the universe at once (Madoka). As powerful as Discord and the Lovecraftian critters are, they aren't omnipotent and certainly not omniscient.