Most of my characters don't really have backstories so much as basic outlines.
Haunton
(Horror-themed town)
The mayor of this town is the head of a cult devoted to the worship of Jack, who in this town's canon is a sort of deity. Seemingly nice on the outside to lure you in, but with dark true intentions hidden beneath, like you'd expect from a cult leader. Nothing happens in the town without her knowing about it, as all the residents are in on the cult.
I also have a vampire character in the town. In my head, I liked to imagine that Boris is a vampire as well (because of his tusks and because his name, Boris, makes me think of Boris Karloff. While Boris Karloff didn't play a vampire, he was in old Universal Monster movies as Frankenstein. Bela Lugosi was also in old Universal Monster movies and played Dracula. So I combined the two.) and either that he bit and passed the vampirism onto her, or it happened some other way and they happened to meet. I prefer him turning her though, more interesting. Either way, they're friends and next door neighbors.
I have two other characters planned, but that I haven't created as of yet because I still need to decide on names for them:
One will be a witch, though more of the common misconception and popular idea of one rather than the actual ones who are just normal people. She creates potions, casts hexes, etc.
The other one will be an Igor-style sidekick for Cobb (who, as is fitting given the interior design of his home, is a mad scientist in my mind) who helps him out and also handles the cemetery.
Mesmeri
(Hybrid Circus/Magic Show-themed town)
The mayor of this town is the ringleader of the circus, who also utilizes stage magic as part of the performances. But as it turns out, her magic isn't just smoke and mirrors, it is actually real, beause...
Another character I have planned will be her teacher, an actual mage. I like to imagine that they used their magic to animate a teapot and that's how we got Tia. I still need to figure out their name though, which is why they don't live in the town yet.
Another character who lives in the town is a clown, because how are you gonna have a circus without a clown? She hangs out with Astrid and Marcel and just wants to make people happy and make them laugh.
The final character in the town, who I also have yet to create as of this moment due to lack of a name, is going to be a sort of carnival strongman.