#since canon is through dipper’s pov it’d make sense for this au to be the opposite

[strawberryshortcake1495]

Here’s my personal interpretation of the Reverse Portal AU aka “The Summer Project”, told through the perspective of Mabel (loosely based off @urdadsceilingfan’s AU)

So this AU version of Mabel is still the sweet bubbly little girl she is but with a sprinkle of sad loser in it. She and Dipper had a normal happy childhood until elementary school, where Dipper got involved with the Book Club. The Book Club mainly consisted of the nerds of the school and Dipper instantly clicked with them, since they were the only people who seemed to understand him. But what Dipper didn’t know was that the Book Club are actually a bunch of misogynists who bullied Mabel. And I can’t even say Dipper didn’t know about it, because sometimes they’d mock her right in front of him. Dipper truly was concerned about his sister but was too afraid of losing his friends. Most of their sexist comments made Mabel want to stray away from doing feminine things which resulted in her to stop doing the things she genuinely loved, like knitting sweaters. Mabel and Dipper would always bicker about the Book Club and their parents were starting to notice how their relationship was starting to strain and they knew the upcoming divorce would just make things worse for them so they sent them off to Gravity Falls for the summer to live with their Grunkle Ford. 

Mabel and Dipper kinda swap places in this AU, but like only a little. Like, their personalities are the same but their sense of self is slightly different. With Ford and Dipper growing close, Mabel feels left out and abandoned. She starts becoming desperate for some sort of connection and that’s when she decides to summon Bill Cipher himself so he can help her become a more likable person. Bill ends up possessing her with the promise that he’ll just do all the socializing for her and she’s very much grateful. Did I mention this takes place in Double Dipper? (It’s a subplot) Bill doesn’t actually do anything threatening or harmful in Mabel’s body, he just acts confident around everyone he sees just like Mabel asked. But this “confidence” just makes her look a weirdo. But luckily, Candy and Grenda LOVE weirdos! So by the time Bill leaves Mabel’s body, she’s already got herself two new best friends. Mabel is extremely grateful and asks if there’s anything she can do to repay him. Bill tells her about the underground lab in the Shack and says if she helps reactivate the portal and allow him into the physical realm, he’ll give her all the friends she needs. Of course, Mabel takes the bait and most of Season 1 is her tracking down the journals and trying to understand them while making sure nobody else knows about her master plan.

In Not What He Seems (although the episode would be titled as “Not What She Seems”, Ford and Dipper find out about Mabel’s plan to free Bill and Ford is freaking out. During the climax of the episode, Ford, Dipper, and Soos confront Mabel about her plan and she has a breakdown about how lonely she was until she met Candy and Grenda and Dipper asks her if having him here wasn’t enough (it wasn’t). Dipper is the one who has to choose between his Grunkle and sister and Mabel is just sobbing the entire time. But instead of him choosing either side, he just stays frozen until deciding to press the button but the timer has already counted down. The person who comes out of the portal isn’t Bill, but Stan himself.