Well, perhaps in the fanfic, Bella's switch - flipping could lead to her exploring different aspects of the vampire world that she was previously afraid of. She could start to interact with other vampire clans, which might initially be a source of conflict within the Cullen family. But eventually, her newfound boldness could help bridge gaps between different vampire groups, leading to a more united vampire community around her.
Her relationship with Edward would likely become more equal. As a human, Bella was often in a more vulnerable position, but as a vampire who has flipped her switch, she could stand on equal footing with him. They might engage in more intense and equal - sided battles or hunts together.
One possible plot could be that Bella discovers she has slayer powers. She then starts training in secret while still being involved with the Cullens. As she gets stronger, she uncovers a new vampire threat that is not like the normal vampires in the 'Twilight' world. This new threat is more powerful and she has to use her slayer skills to defeat them and protect both the humans and the vampires she cares about.
One possible plot could be Bella struggling to hide her discomfort during her period while dealing with the usual vampire - human drama in Forks. Maybe she's worried about Edward smelling the blood and it adding an extra layer of tension to their relationship.
One possible plot could be that Bella, as a 2000 - year - old vampire, has amassed a great deal of power and knowledge. She could be a sort of mentor to the younger vampires in the Twilight universe. Maybe she has secrets about the origin of vampires that she has kept hidden for centuries. And she might be trying to prevent a war between different vampire clans by using her influence and wisdom.
One possible plot could be that Bella is afraid to speak out about the abuse due to threats from the abuser. So she hides it from her friends and family, trying to act normal while suffering in silence.
One possible storyline could be Bella's struggle to fit in with the Pierce Vampire community. She might face discrimination or challenges because she was originally a human associated with the Cullens. Another storyline could be her search for her true identity as a Pierce Vampire. Maybe she discovers she has a special role or prophecy associated with her new vampiric form. And she could also be involved in a power struggle within the Pierce Vampire hierarchy.
A possible plot could be Bella using her witch powers to break some of the traditional vampire rules. For instance, she might find a spell to allow vampires to walk in the sun without sparkling. This would create a stir among the vampire community and lead to various reactions, from envy to attempts to stop her.
Perhaps Bella Swan joins the CIA to find a way to use her immunity to vampire mind - control for the greater good. The CIA discovers her special ability and decides to train her as a special agent. She then gets involved in a high - stakes mission where she has to face off against a powerful and devious enemy who is using mind - control techniques on a global scale. Her task is to stop this enemy while also keeping her identity as a Twilight - world - influenced person a secret.
Well, it could be that Bella Swan uses her sharpshooting skills to protect her loved ones from some kind of danger in Forks. Maybe there's a new threat in town that only her shooting skills can handle.
Well, a plotline could involve Bella being hunted by some sort of demon hunters who sense her devilish origin. Meanwhile, she tries to understand why her father was involved in hiding her true identity all this time. She could also have an internal struggle between the good in her, which was influenced by her human upbringing, and the evil tendencies that come with being the devil's daughter. There might be a prophecy about her that she has to either fulfill or fight against, and this could be intertwined with the Twilight universe's existing supernatural elements.