One possible plotline could be Bella adjusting to her new vampire abilities. For example, she might struggle with her increased strength at first and accidentally break things. Another could be her relationship with Edward changing as they are now both vampires. Maybe they have newfound understanding and experiences to share.
A really interesting plotline could revolve around Bella's human memories and how they affect her as a vampire. She may have a hard time letting go of her human life completely. This could lead to internal conflicts, such as her longing for human food or her missing the simple things like sleeping. And perhaps she tries to find a way to hold on to her humanity while still embracing her new vampire nature.
Well, a plotline could be Bella's reaction to no longer being able to eat human food. She might miss the taste of her favorite dishes and have to deal with the cravings for blood instead. Also, there could be a plot where she discovers new vampire powers that are unique to her. This could lead to her being both feared and respected among other vampires.
Another plotline might involve Harry's transformation leading to him having new magical abilities related to his vampire state. He could discover that he can now move with super - speed through the halls of Hogwarts, which both helps and hinders him in his adventures. He also might have to deal with the fact that some vampires in the fanfiction world view him as an oddity since he was once a wizard and now a vampire.
In some 'Bella Swan as a Vampire' fanfiction, a great plotline is her exploration of her new vampire senses. She could find that her sense of smell leads her to discover things about the past of the places she visits. And in terms of relationships, her bond with Edward could change in a really interesting way. Since they are both vampires now, they might have different power dynamics and new challenges in their relationship. For instance, they could compete in terms of their vampire skills, which could either strengthen or strain their relationship.
One interesting plotline could be Bella's struggle to control her new vampire instincts while still maintaining her relationships with her human friends and family. For example, she might have a hard time being around them without revealing her new nature.
Well, perhaps the story could revolve around the sister's past before becoming a vampire. She might have had a human life full of secrets and unfinished business. In the fanfiction, she could be trying to resolve those while dealing with her new vampiric nature and her relationship with Bella. For example, she might have had a human love interest and now she has to figure out how that fits in with her new existence as a vampire sister to Bella.
A third plotline might be that Bella and Edward face a new kind of threat to their vampire family. Maybe a group of powerful and evil vampires from a far - off land come to Forks, and they have to use all their skills and the help of their friends to protect their family and way of life.
One interesting plotline could be Bella discovers Edward's vampire nature in a more dramatic way than in the original. For example, she might witness him using his super speed to save her from an immediate danger like a speeding car. Another could be that Edward is initially more hesitant to be around Bella because he fears his vampire instincts more strongly, creating more tension in their relationship.
Well, a common plotline is Bella's discovery of new vampire senses. In fanfiction, it could be that she discovers she has a unique sense that other vampires don't have, like being able to sense the emotions of humans from a great distance. Also, there could be a plot where Bella has to hide her new vampire self from her human family and friends, which creates a lot of tense and emotional moments as she tries to keep her double life a secret.
One interesting plot twist could be that Bella, as a new vampire, discovers she has unique powers that no other vampires have. For example, she might be able to control the elements in some way.
One possible plotline could be the exploration of the relationship between Bella and her vampire sister. Maybe they have to face some challenges together, like dealing with other vampire clans who see them as a threat. Another could be their journey in discovering their unique powers as sisters in the vampire world.