One interesting aspect could be how their relationship dynamics change. In the original, Edward was the vampire and Bella was the human, so reversing their roles might lead to a different power dynamic. For example, Bella as a vampire would have more physical strength and speed, which could make her more protective of Edward. Also, Edward as a human might struggle with his mortality compared to Bella's immortality, creating new tensions and storylines in the fanfiction.
One great fanfiction could be where Edward and Bella's relationship is explored more deeply in a different vampire society setting. For example, they might be in a vampire clan that has unique rules about human - vampire relationships.
A common theme is the 'what - ifs'. What if Bella had chosen Jacob instead? Fanfictions often explore this alternative storyline and how it would affect the vampire - human relations in Forks. It can be really interesting to see how the characters develop in this different scenario.
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.
Often, you'll see Edward in these fanfictions. Even though the story is about Bella as a vampire before Twilight, Edward still plays a role. Maybe he's a mystery to Bella at first, or he's from a different vampire group that she has to interact with. Another common character is Jacob. He could be in a more antagonistic role, being jealous of Bella's new vampire life. And of course, the Cullens might be mentioned or even play a part. Carlisle could be a figure that Bella looks up to for advice on being a 'good' vampire.
Some fanfictions in 'bella vampire before twilight' might focus on her backstory as a vampire. For instance, perhaps she was turned against her will by an evil vampire, which made her have a different perspective on vampire society. This could lead to her trying to find a way to break free from the typical vampire code. Or she could have been turned by accident, like in a fight with a vampire where she was bitten instead of killed, and then had to figure out how to live with her new state on her own.
One popular fanfiction could be about Bella using her vampire abilities to protect Edward from some new supernatural threat in Forks. Maybe she has to face a powerful vampire coven that has a vendetta against the Cullens, and in the process, her relationship with Edward deepens in new and unexpected ways.
In fanfiction, the stories can deviate from the original plot. For example, some fanfictions might change the ending. In the original Twilight, the ending was a certain way, but in fanfiction, Bella and Edward could end up in completely different situations.
There's also 'The Redemption of Edward Cullen'. This fanfiction explores Edward's past in more detail and how it affects his relationship with Bella. It adds new layers to his character and gives a fresh perspective on their love story.
In many Twilight fanfictions, Edward and Bella's kiss is often depicted as an extremely passionate and intense moment. Some fanfictions might explore different scenarios around this kiss. For example, it could be set in an alternate universe where they meet under different circumstances before the kiss. The kiss in fanfiction can also be used to show a deeper connection between them than what was shown in the original books. It allows the writers to play with the emotions and the relationship dynamics in a more creative way.