Alice Cullen could also play an important role. Given her ability to see the future, she might foresee some sort of trouble related to Bella's period, like a vampire from another coven being attracted to her blood at this time. And she could be involved in trying to protect Bella.
Edward Cullen would likely be a main character. His reaction to Bella's situation, whether it's concern for her well - being or struggle with his vampiric instincts around her period blood, could be a major part of the story.
Alice Cullen can be a very popular character. Since she can see the future, in a 'reborn as bella swan' scenario, her interactions with Bella could be really different. Maybe she tries to guide Bella in a new way based on her visions. Also, Carlisle Cullen is popular. His father - figure role towards Bella might be explored further in these fanfictions.
One of the main characters could be a villainous vampire. This vampire could be after the sisters for some reason, like their unique powers or because they pose a threat to his own plans in the vampire world. Also, Bella's father Charlie could be a significant character. He might start to suspect that something is different about Bella and her sister, and his reactions and attempts to figure out the truth could be an important part of the story.
Edward would definitely interact differently. If Bella goes back in time and changes her initial approach, Edward might be more or less intrigued by her. For example, if she's more confident, he might be even more drawn to her than in the original story.
Edward is still very popular. Since he and Bella are now both vampires, their relationship takes on new aspects that fans like to explore. Another popular character is Alice. Her ability to see the future could be really interesting in a story where Bella is a vampire. She could foresee events that involve Bella and help her avoid danger or make important decisions.
Edward is an obvious choice. As the father of the baby, his role is crucial. He can be portrayed as overprotective, or struggling to understand the new situation. Jacob could also be included. His relationship with Bella is complex, and his reaction to her pregnancy could add a lot of drama. Then there's Carlisle. As a doctor - like figure in the vampire world, he can offer medical advice and support during the pregnancy.
One possible plot could be Bella struggling to hide her discomfort during her period while dealing with the usual vampire - human drama in Forks. Maybe she's worried about Edward smelling the blood and it adding an extra layer of tension to their relationship.
Edward Cullen is often a popular character in these fanfictions. Since he has a close relationship with Bella in the original story, his role can be further explored in relation to Rosalie and Bella's relationship. Another one could be Alice Cullen. Her ability to see the future can add an interesting dynamic, especially when it comes to predicting things that might affect Rosalie and Bella's friendship or any adventures they might go on.
It could be a character named Jake. He's a very competitive Bakugan brawler who sees Bella as a threat because she's quickly rising in the ranks. He's always trying to one - up her in battles and spread rumors about her to make other brawlers not trust her.
She might be portrayed as a villain by showing her being manipulative. For example, she could use her relationship with other characters to get what she wants, like using Edward's love for her to control his actions or decisions.
Well, in some fanfictions, she might be depicted as the devil through her actions. Maybe she's shown as being manipulative, using her charm to get what she wants from others, much like how the devil is often portrayed as a tempter in traditional stories.