There are quite a few characters that are commonly paired with Bella in these fanfictions. For instance, Black Widow is a likely candidate. They could share their experiences as agents, their combat training, and their knowledge of the spy world. Then there's Agent Phil Coulson. His calm and collected nature could be a great foil to Bella's character, whether she's more impulsive or more by - the - book. And don't forget about Loki in some crossover fanfictions. His mischievous nature can create all sorts of chaos and interesting interactions when paired with Bella as a Shield agent.
Edward is often paired with Bella in such fanfiction. Since he is a vampire in the original story, the dynamic between a dhampir Bella and vampire Edward can be very interesting. There could be a lot of tension and new plotlines. Another character could be Jacob. His werewolf nature could add another layer of complexity to the relationship when Bella is a dhampir.
Often, she might be paired with Gibbs. Their relationship could be one of mentorship, where Gibbs teaches Bella the ropes of being an NCIS agent. Or there could be a more complex dynamic where they have different approaches to solving cases but learn from each other.
Edward is often still a key character. If Bella is not human, their relationship dynamic would change drastically. For example, if Bella is a vampire, they might have different power levels or views on being a vampire, which could create conflict or a new kind of bond. Another character could be Jacob. If Bella is some sort of magical being, Jacob's werewolf nature might interact with her in unexpected ways, like an alliance or a rivalry.
One popular character paired with him is Jessica. In some fanfictions, they start as friends but then develop deeper feelings for each other. Their relationship is interesting because Jessica is so different from Bella, and it shows a different side of Bella's brother.
Well, Bella Swan as a SHIELD agent might bring some unique skills. Maybe her knowledge of the supernatural world in the Twilight universe could give her an edge in dealing with otherworldly threats that SHIELD sometimes encounters. She could be assigned to a special unit that focuses on such threats, using her past experiences to her advantage.
One popular 'Bella is a Shield Agent' fanfiction might be 'Bella's Shield Adventures'. It could explore her training as an agent, her relationships with other Shield members, and the missions she goes on. Another could be 'Bella in the Shadows of Shield' which might focus on her undercover work within Shield. And there could be 'Bella: The New Shield Agent' which perhaps details her rise as a rookie agent in Shield.
In 'raising bella fanfiction', Bella is the mainstay. However, antagonists can also be a major part of the story. They could be characters who oppose Bella's goals or new threats that she has to face. Their presence helps to create conflict and move the story forward, making it more exciting as Bella tries to overcome these obstacles.
Definitely Bella as the main focus. In many fanfictions, Jessica Stanley could also be involved. She might be jealous of Bella's new look or try to be part of the makeover process in a not - so - nice way. Angela Weber could be there too, perhaps as a more positive influence, helping Bella with her new image in a more down - to - earth manner. And of course, Carlisle or Esme might play a small role, like providing support or resources for Bella's makeover, especially if it has a deeper meaning in the story, like becoming part of the vampire family.
Definitely Bella is a must - have character. Edward, as her love interest in the original, is almost always there. Jacob, being an important part of Bella's life in the books, is also frequently in fanfiction. Additionally, the Volturi characters like Aro, Caius, and Marcus can be main characters in some fanfictions. These powerful vampires can bring a lot of drama and conflict to the stories, especially when their laws and the Cullen family's existence are involved.
Obviously, Bella is a main character. Edward is often still involved as her love interest. Even if Bella is godlike, their relationship can be explored in new ways, like how Edward copes with Bella's new - found power.