Who are the main antagonists in 'bella and edward join volturi fanfiction'?

Well, in some fanfictions of 'bella and edward join volturi', they join because they believe it's the only way to ensure the safety of their family and friends. Once there, they could be involved in power struggles within the Volturi. For example, there might be factions that don't trust them and try to undermine their position.

In some cases, there could be a new vampire or a shape - shifter who enters the prison and has a vendetta against Edward or Bella. This character would then be a major antagonist, constantly trying to harm them and prevent them from achieving their goals of getting out of prison or finding justice.

Often, other vampire clans that oppose Bella's transformation can be the main antagonists. They might see her as a threat to the vampire world order. For example, a traditionalist clan that believes humans should not be turned so easily could try to harm Bella or drive her away from Edward.

Maybe there are some powerful and corrupt humans in the gang wars. They are not afraid of vampires and want to take over the territory that Edward's family has been protecting. These humans could be the main antagonists as they constantly create trouble for Bella and Edward.

It could be the Volturi. Since the baby is a vampire - human hybrid, the Volturi, who are very strict about vampire laws, might see the baby as a violation of their rules and try to eliminate it.

The Volturi could be antagonists. In the Twilight universe, they are the powerful vampire coven that enforces vampire laws. They might see the baby as a threat to their power or a violation of their rules. They could try to eliminate the baby or control Bella, Edward, and their family.

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.

It could be that some of the humans who have discovered the existence of vampires and the new baby become antagonists. They might form a group to hunt down the Cullens and the baby, fearing that the baby could be the start of a new vampire - human hybrid race that could overpower humans.

There could also be other vampires or humans who play important roles. For instance, some fanfictions might introduce new vampires who are either allies or enemies of the Volturi and have a connection to Bella's situation. And there might be human friends of Bella who get involved in the story, like Jacob or her school friends, although their roles might be secondary compared to Bella and the Volturi.

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.