In 'bella becomes a badass vampire fanfiction', she could develop unique vampire powers. For example, she might be able to control the minds of other vampires. This would put her in a powerful position within the vampire world. She could also use her new status to change the way vampires interact with humans, making it more peaceful or something like that.
Perhaps some of the other Cullen family members would be her allies. They are already vampires and could help her adjust to her new powers and the vampire lifestyle. For instance, Alice might use her power of seeing the future to guide Bella in making important decisions. Jasper could teach her how to control her new vampire instincts, like the urge to hunt. And Emmett could be her sparring partner to help her improve her combat skills.
Well, perhaps Bella starts learning self - defense skills. She could train with a mysterious mentor and then be able to take on any threats in her world. For example, she might face off against some dangerous supernatural beings and defeat them with her newfound badassery.
It could be a powerful vampire who doesn't like Bella's new - found strength. This vampire might see her as a threat to their own power and control in the vampire world.
Well, in the fanfiction, Finn could be part of a secret vampire society. He'd have to learn their rules and customs. There might be a hierarchy among the vampires, and Finn would have to find his place. Maybe he'd be a special kind of vampire with unique powers that the others envy or fear, which would create a whole lot of drama and intrigue within the vampire community.
Well, in this fanfiction, Bella might face challenges in hiding her vampire nature at school. For example, she could struggle with controlling her super strength during gym class or her enhanced senses in a crowded cafeteria. Maybe she'll have to deal with other students who are suspicious of her new, more alluring appearance.
One popular 'badass vampire bella fanfiction' might be those where Bella has enhanced combat skills. For example, in some stories she is trained by ancient vampires to become a formidable fighter, using her newfound abilities to protect the Cullen family instead of always being the one in need of protection.
She might start imagining herself as an assassin in the Twilight world. Maybe she'd use her vampire speed and strength in new, assassin - like ways to protect Forks or her loved ones.
Well, for one, the whole concept of their courtship would be different. Since Bella is now the vampire, she would be the one with the enhanced senses and abilities. She might be more forward in the relationship as she doesn't have the same insecurities as she did as a human. Edward, on the other hand, might be more hesitant and in awe of Bella's newfound power.
You can start by looking on fanfiction websites like Archive of Our Own (AO3). It has a large collection of Twilight - related fanfictions, and you're likely to find some great 'badass vampire bella fanfiction' there. Just use the search bar and type in relevant keywords.
A lot could happen. Edward could have some clashes with the vampires in the Forbidden Forest, if there are any. Bella might make friends with some of the more curious students at Hogwarts, like Hermione. And perhaps there would be a situation where Edward's mind - reading ability is either an advantage or a hindrance in the magical world. For example, he could read the minds of those planning to expose him, or it could be blocked by some powerful magic spells.