The relationship could start with a simple attraction. Maybe it's the way Bella has a certain air of mystery about her that draws Peter in, or how Peter has an alluring vampire charm that catches Bella's eye. But then it can grow deeper. They could start spending time together, just the two of them, away from the chaos of their normal lives. They could cook together (even if it's just for show since vampires don't really need to eat), and during these simple moments, they start to see each other as more than just an acquaintance. They start to see a future together, and this is how their relationship can be developed.
In fanfiction, their relationship might develop through a series of adventures. Suppose they go on a quest to find a rare artifact that has the power to either save or destroy the vampire world. Along the way, they face numerous challenges like dangerous terrains and other powerful vampires. During these hardships, they start to care for each other more. Peter might show his protective side towards Bella, and Bella might be the one to give Peter hope and a new perspective on life. This would strengthen their bond.
It can start with a chance encounter in Neverland. Then, through shared adventures and facing challenges together, their relationship can grow. For example, they might have to rescue each other from dangerous creatures in Neverland.
There are definitely some out there. It really depends on what you're looking for in a fanfiction. If you like adventure - filled stories, you might find ones where they go on some sort of quest together. Or if you prefer more of a romantic angle, there could be fanfictions exploring their potential romantic relationship, but keep in mind that this is a fan - created concept and not part of the official canon.
Their relationship can be developed through shared experiences. For example, they could face a common enemy together. This would force them to rely on each other and understand each other's strengths and weaknesses.
One common theme is the exploration of the supernatural world from their perspectives. Since they are from the vampire - related universe, many fanfictions delve deeper into the rules and mysteries of that world.
One idea could be that they meet in a completely unexpected place, like a small European town during a music festival. Bella is there to experience new things after the events in her own story, and Peter is there to escape his past. Their initial encounter is full of tension as they sense something different about each other. Another plot could involve them having to work together to solve a mystery that involves both the vampire and human worlds. Maybe a new type of vampire is emerging that threatens both, and they must combine their unique skills and knowledge to stop it.
To develop Bella in this fanfiction, she could be given a mentor. Maybe an old witch who has been watching over her. With the mentor's help, she can learn about the history of doppelgangers in the witch world and how to control her powers. She can also struggle with the morality of using her powers, like whether she should use them to get revenge on those who have wronged her in the past.
It depends on the specific fanfiction. Some fanfictions focus more on action or other plot elements rather than fully developing their relationship. However, in the ones that do, it can be a really interesting and complex relationship with a lot of emotional depth.
Another way is through a mutual acquaintance. Maybe someone they both know gets into trouble, and they have to cooperate to save that person. During this process, they learn about each other's pasts, their hopes and fears. Baelfire could share his story of his father and his journey, and Peter Pan could share about his longing for a true friend. This exchange of stories could lead to a stronger bond between them.
Another way is by exploring their family backgrounds. Peter lost his family on Earth and was then adopted by the Ravagers. Nebula was mistreated by Thanos. By comparing and contrasting their family situations, they can find common ground. They could talk about how they both long for a real family. This can lead to a deeper emotional connection between them. For instance, they might start to think of each other as family in a way.
In fanfiction, their relationship could be developed through shared experiences in the present. For example, they could be trapped together in a strange dimension. During this time, they are forced to rely on each other, talk about their feelings, and gradually build a more positive connection. Peter might learn about Ego's loneliness throughout the eons, which could make him more empathetic towards his father. This would be a big step in developing their relationship in a new way. Also, Ego could show his love for Peter in more selfless ways during this time, instead of just trying to use him for his grand plan.