Yes, there are likely some fanfictions with this concept. Fanfiction writers often explore unique and alternative storylines for popular characters. Bella being an undercover Volturi member could lead to all sorts of interesting plot twists, like her having to hide her true motives from the Cullens while also trying to carry out whatever mission the Volturi have given her.
One common theme is secrecy. Since Bella is undercover, there's a lot of hiding her true self and motives from the Volturi. Another theme is danger. The Volturi are a powerful and often menacing group, so Bella is constantly in peril.
Well, I'm not sure of the exact title, but there are some fanfictions where Bella being undercover in the Volturi leads to some unexpected alliances. She might team up with some characters that you wouldn't expect in the original Twilight series. This kind of plot development makes the fanfiction really interesting as it gives a new perspective on the relationships between the characters.
Well, she may try to use her position to influence the Volturi's decisions. Maybe she could try to prevent them from taking actions against the Cullens or other vampires she cares about. Also, she would likely have to deal with the other Volturi members who are very powerful and perceptive. She'd have to be constantly on guard not to be discovered. And her relationship with Edward would be put to the test as she has to keep this huge secret from him. It could lead to a lot of tension and drama in the story.
In the Twilight universe where this fanfiction is based, the Volturi kings are Aro, Caius, and Marcus. They are the leaders of the Volturi, an ancient and powerful coven of vampires.
There could be other vampires that Bella meets during her time as a vampire before the Volturi. For example, some lone vampires who are also trying to stay out of Volturi's radar. They could become her allies or foes depending on their motives.
There is also a possibility that a lone vampire, who has a sense of justice or who has been secretly observing Bella and has grown fond of her, decides to take on the Volturi and rescue her. This vampire could have some special abilities or knowledge that gives them an edge against the powerful Volturi.
Power is a common theme. The Volturi are a very powerful coven, and Bella's relationship with them often involves her dealing with their power. Another theme is loyalty. Bella has to decide where her loyalties lie - with the Cullens or with the Volturi. And of course, love. Whether it's her love for Edward or some new relationships she forms within the Volturi world.
Well, it depends on the specific fanfiction. There are countless fanfictions out there, and while the idea of Bella Swan being a Volturi member is not part of the original Twilight canon, some authors like to take creative liberties. In some cases, she might be a reluctant Volturi member, forced into their ranks for some reason. In others, she could be a willing participant, drawn by their power and mystery.
There are many interesting aspects in this kind of fanfiction. Often, it explores a different power dynamic for Bella. She might be seen as a strong and influential figure within the Volturi world, bringing new ideas and changes. Writers may also play with her relationships, like how she interacts with the existing Volturi members in a more dominant role.