Obviously, Edward Cullen and Bella Swan are the most important. Edward, the vampire, is central to the story as Bella's groom. Bella, the human - turned - vampire - later in the original series, is the bride. Then there's Alice Cullen. She is often a key character as she loves to plan events and would be all over the wedding preparations. Jasper Cullen might also be important as he could help keep the emotions in check during the big day. And of course, Charlie Swan, Bella's father, his presence or his thoughts about the wedding could be a significant part of the fanfiction.
Definitely the other members of the Cullen family would be special guests. Carlisle and Esme, who are like parents to Edward, would be there to support them. Alice would probably be super involved in the wedding planning and be a very enthusiastic guest. Jasper might be there to keep everyone calm in case there are any tense moments. Also, Bella's human friends like Jessica and Angela could be special guests. They would be there to witness Bella's big day and share in her joy.
Well, in many fanfictions, there could be details like Bella's unique wedding dress design. Maybe it's a dress that combines modern and vintage elements, with lace sleeves and a long train. Edward might be wearing a traditional tuxedo but with a special Cullen family crest pin. There could also be details about the wedding venue. It could be a beautiful meadow filled with wildflowers, a departure from the more common church or ballroom settings. The vows they exchange might be more personalized, perhaps including references to their shared vampire - human experiences and their deep love that overcame all odds.
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.
Edward could be one of her allies. He could use his vampire abilities such as super - speed and strength to assist Bella in dangerous situations. His centuries - old knowledge could also prove invaluable in understanding the motives and actions of the CIA's enemies. Another ally could be Jacob. His shape - shifting abilities would give the team an extra edge in combat or in covert operations. He could also use his connection to the werewolf pack to gather information from areas that the CIA might not have easy access to.
In this fanfiction, Bella Swan as Hecate could be depicted as a very wise and mysterious figure. She may use her knowledge and powers to protect those around her. Just like Hecate is often associated with crossroads, Bella might be in a position to make important decisions for the characters in the story. She could also have the power to transform things or people, which is a characteristic often linked to Hecate.
In some fanfictions, Bella's character might become more confident. As an immortal, she no longer has the same fears of mortality. For example, she could be more fearless in facing dangerous situations.
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.
To develop Bella in this fanfiction, she could be given a mentor. Maybe an old witch who has been watching over her. With the mentor's help, she can learn about the history of doppelgangers in the witch world and how to control her powers. She can also struggle with the morality of using her powers, like whether she should use them to get revenge on those who have wronged her in the past.