Got bored and stressed like crazy these past few days and I really needed to focus on something nice and cosy so I went back drawing that girl ahah ><
I know it is of no valuable interest but still, it feels vetter to share it rather than to let it rot inside my phone as a nameless screenshot ahah X'3
Anyway, if Bill possesses Rania, this could be what would happen to her. She'd be somehow granted the gift of seeing it all, like a cosmic being, part of the stars and somehow becoming a constellation herself. However, she'd still get used by Bill as some henchwoman, to help him assure his dominance on Gravity Falls by hunting down every member of the Zodiac to stop people from trying to stop him.
In this version of the story, Ford escapes the bell tower with Dipper and hides with everyone else in the Shack. After Rania is sent there to capture them all, everyone splits and tries to hide away from her huntress form.
The more she is transformed like this and the more she loses herself and what makes her human, like sympathy, empathy, sadness, attachment etc. She's still Rania, but under a layer of complex feelings, so one would have to dig up her very core-self to bring her back to normal and to reason.
Her capacities include creating wormholes to move, like teleportation, and some sort of blackholes that are like pocket-timeless-prisons in which she keeps her "preys" until she get them locked up at the Fearamid.