Well, in this fanfiction, Bella might learn a great deal about the Volturi's history and their ways. She could get involved in their internal politics, perhaps helping to resolve some disputes among them.
One scenario in the 'bella is friends with the volturi fanfiction' could be that Bella, being friends with the Volturi, tries to humanize them in the eyes of other vampires. She might host gatherings where the Volturi and other vampires can interact more amicably. This could lead to a change in the power dynamics in the vampire world as the Volturi become more approachable. Also, Bella could be privy to the Volturi's secrets and use this knowledge to her advantage, like preventing them from making hasty and unjust decisions.
In this fanfiction, she might gain new powers. Since the Volturi Guard is known for its strength and special abilities, Bella could be transformed in many ways.
Well, it could be that Bella and Alice are on a mission to learn some secrets from the Volturi. They might be disguised or using their unique abilities to get close to the Volturi leaders. It could also involve some tense moments of almost being discovered and having to use their wits to escape tricky situations.
In some fanfictions, they might face a series of challenges. For example, they could be wrongly accused of breaking vampire laws. The Volturi might be very strict and unforgiving in the fanfiction world. Bella and Alice would have to use their wits and powers, if any, to defend themselves. Maybe they would try to negotiate with the Volturi leaders like Aro, Caius and Marcus.
Obviously, Bella and the members of the Volturi are the main characters. Bella, as we know from the original story, is a human who has a special connection to the vampire world. And the Volturi members, like Aro, Caius, and Marcus, play important roles as they are the powerful vampire rulers.
In some fanfictions, they might explore new places together. Maybe they would visit a secluded beach where they can enjoy the sunset in peace. Alec could show Bella the unique vampire culture he is a part of, like special vampire - only events or places.
If Bella Swan's cousin fell in love with a Volturi in fanfiction, it would likely be a very dangerous situation. The Volturi are known for their strict rules and harsh punishments. The cousin might be in immediate danger just for being a human in a relationship with a powerful vampire. There could be attempts to either turn the cousin into a vampire quickly or to keep the relationship a secret from the rest of the Volturi.
One possibility is that Bella is forced to join the Volturi for some reason. Perhaps the Cullens are in trouble and the Volturi offer Bella a deal - join them and they'll spare the Cullens. So she enters their world, where she has to deal with the different personalities among the Volturi members, like Aro's calculating nature and Caius' harshness.
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.
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.
If the Volturi find out Bella is into Greek god fanfiction, it could have a range of reactions. They are a rather old - fashioned and strict group. On one hand, they might simply dismiss it as a harmless human quirk. But on the other hand, if they think it somehow affects Bella's loyalty to the vampire world or her relationship with Edward, they could take a more serious stance. For example, if they believe her interest in Greek gods makes her question the power structure in the vampire world, which is centered around them, they might try to discourage her or even take more extreme measures to keep her in line.