Not great.
A year before Mabel met Henry, she had a six month relationship with a girl named Heather Sawyer, a fellow Californian with curly blonde hair and an infectious laugh. And for awhile, things went great! Heather met Dipper and they actually got along well and Heather didn’t seem creeped out by the fact that Dipper was a demon. Towards the end, Mabel even began wondering if Heather was The One.
Heather, on the other hand, didn’t feel the same.
Thus one day Dipper felt himself pulled towards the Shack, called by his family circle….and bound by his True Name by his sister’s girlfriend.
Heather offers Dipper (offers him!) a deal. He does what she wants-puts some hard cash in her account, a new car, maybe a seat in Congress, nothing too crazy-and she doesn’t tell the world the True Name of Alcor the Dreambender.
Dipper laughs in her face, because all and sundry having his True Name….that, that would be a big problem, no bones about it, but he is a demon. What he can’t weasel his way out of he can wait out. Hell he’s bound by Heather now, but all he needs is one slip up on her part and he’s good.
Then she brings up Mabel and Dipper grows still. Heather smiles and how did DIpper miss that nasty edge to it before?
Yes, wouldn’t it be interesting if people found out that the grand and terrible Alcor had a human family? Had a great-uncle (stop), had parents (stop), that Mizar wasn’t another demon but his sister (S̗̠͈T̗͠O͉̬̺̗̣̬̠P̫̫.)
Heather drops the smile. Names, addresses, other personal information; she’ll blast it all out over the internet and to every news outlet she can unless Dipper does what she says (and oh doesn’t it gall him to have this woman call her Dipper, call him by the name he trusted her with and is now his jail.)
Dipper is well and truly fucked….and that’s when Mabel steps into the room.
Mabel who was coming into the kitchen to get a glass of milk and heard voices coming from the living room.
Mabel with tears streaking down her face, betrayed by the woman she loved.
Mabel with a bat in her hands because no one, no one, threatens or hurts her brother.
Once the circle is broken, and Heather is made at bat point to let Dipper free of his bonds, there is the question of what to do with her. She lives…but only because Mabel points out to Dipper that they’re supposed to be better than her, better than that.
Heather lives…but she moves as far away from Oregon as soon as possible. She spends the rest of her life operating a ham radio station out of the Falkland Islands, and never falls asleep with the lights out again.
Mabel sobs herself to sleep in Dipper’s arms that night, and he’s worried that something precious and beautiful in his sister has been irreparably broken.
But.
While Mabel hurts, and fuck does Heather’s betrayal hurt, and she takes some time to lick her wounds and mope…. eventually she starts putting herself out there again because Mabel knows that its better to get back on the horse that bucked you off than to never try again.
It is in that mood (and with a few beers to relax her and Wendy’s vouchsafe) that Mabel meets Henry at a party ten months later.