Okay, So gonna start with the overview
There are three Parrellel histories in the Sfth timeline
Magic starts from the beginning of time but slowly gets hunted (especially Cause of the Witchfinder General) until at some point there's some level of treaties made with the magical beings to allow certain ones to have governance over their own realms, etc (Wine Under the Bridge Trolls, The Giants in one of the Livestream Longforms called When I Rule The World, I'll Plant flowers)
I think there's specifically two types of hunters: familial ones (think Supernatural, where the Winchesters is a whole Bloodline of Hunters)
Or, Non-Familial ones (Inspector Whitstable and Detective Flynn)
So for the Familial ones I specifically have the Mcavoys as a family tree because Grandpappy Mcavoy seems like the type to teach his sons how to hunt monsters, and Going off of the Headcanon of Drummer Jeff being a Mcavoy, I'm just thinking he lives 50 year of his 150 year life happily. He has a wife and manages to have Terrence, but shortly after his birth, Jeff goes on a hunt, becomes a wolf, and tragically, Terrence's mama dies.
Then, for the first ten years of Terrences life, he is raised with Claude (whose own parents died in some way) to become the next hunters. But Terrence gets changed by his dad, who tries to even visit his son, and then Terrence and Claude hide Terrence's new Wolf identity from Grandpappy. Terrence becomes a con-man cause of it, and Claude helps. And their cousin is just a clueless city-faring Sheriff (Since Aj's character is also a cousin)
A headcanon of mine is that a descendant of Claude and Felicity (cause I feel like they're a cute couple even if canonically they didn't canonically get together) anyway, A descendant of them is Anna the Vampire slayer.
On the non familial side, I think Inspector Whitstable manages to retire, and Detective Flynn (now inspector flynn) writes the Whoopsie now. And Flynn get a new recruit of his own, a Young Ethelle (The Grandma from No I don't want to visit grandma!)
And that's how Ethelle (and, in turn, her family) gets into hunting for artifacts and researching into it.
Then there's also the religious leaders who hunt (witchfinder general, Father Andrews, a couple more I can't remember but they were livestream longforms)
Now, you may be asking, but some of these longforms contradict each other! This is where the Livestream Longforms Inside the Mirror and a best out of a series of bad options comes in, because guess what! TIME TRAVEL!
Sam makes a joke that makes it canon that a rocket launcher exists in cowboy times?
Time distortions from our two groups of time travelers!
Now, Normal People is pretty easy (they sometimes have supernatural stuff or animal stuff in them, but most of those are straight forward Longforms)
Animals are the smallest part of the timeline because they don't appear until around 2010 in my timeline, mind you 2010 is when the animals gain sentience (with some exceptions) specifically The Hare who wore a sweater is the cause for Creatures like Mr. Polar bear to be able to speak English or gain enough smarts to create masks to help speak english.
I could go into way more detail. Like how Joe Maggliano is the Reason Donnie and Frankie never went to jail. /etc.