It's possible that there are some friends of Bella's who play important roles. They could be normal humans who are initially unaware of Bella's connection to the moon but gradually become involved in her adventures. Maybe they help her in different ways, like providing emotional support or using their own skills to assist her in difficult situations.
Well, obviously Bella and her child are main characters. The child could be a little girl or boy with unique features. Edward also often plays a major role as the father. Sometimes other Twilight characters like Jacob might also be involved, perhaps having a special relationship with Bella's child.
Perhaps in the fanfiction, Bella is part of a hidden community of 'children of the moon'. There could be a plot where she has to prove herself to this community and face challenges that test her loyalty and abilities. For example, she might have to complete a difficult task during a full moon to be fully accepted.
Edward, the brooding vampire, and Bella, the kind - hearted human. In this fanfiction, they are the central focus. Edward has his own issues and inner turmoil related to his vampire nature and his love for Bella. Bella, on the other hand, has been pining for Edward during his absence.
Definitely Edward and Bella themselves are still very popular. Their relationship and how they parent the child are often central to the stories. Also, the other members of the Cullen family like Alice. Alice might have premonitions about the child's future, which can add a lot of mystery and intrigue to the story.
The main character is always Bella in this type of fanfiction. However, new characters could be introduced as well. For instance, a blind mentor who has learned to live fully with blindness could be added. This character could guide Bella and help her accept her condition. Or there could be a villain who tries to take advantage of Bella's blindness, which would then lead to a conflict where Bella has to use her wits and other strengths to overcome the villain.
There could be Edward. Even if Bella is now immortal, Edward might still play a significant role. He could be either her eternal love or her adversary depending on how the fanfiction is written. Another character could be Alice. Since Alice has her own special abilities, she might be there to help Bella navigate the new world of immortality. For example, she could foresee some of the challenges that Bella will face. Also, Jacob might be a main character. His relationship with Bella, whether it's a friendship or something more complicated, could be further explored in the context of Bella's immortality.
There could be Edward. Maybe he is involved in Bella's life with her psychic powers. He might be curious about her abilities or even try to protect her from the consequences of using those powers.
There could be a female character, Sofia, who is another member of the mafia. She sees Bella as a threat at first, thinking she'll steal her position or the attention of the men in the mafia. But as time goes on, they might form an unlikely alliance. There may also be a young and ambitious mafia underling named Antonio, who is always looking for ways to climb the ranks and his actions often impact Bella's situation in the story.
Bella in these fanfictions is often still the same at her core - a bit stubborn and very much in love with Edward. But she also becomes more independent and confident as she spends more time with Alice. She starts to trust her own instincts more.
Yes, there are likely fanfictions out there with this concept. Fanfiction writers often take existing characters like Bella Swan and create unique scenarios for them, such as making her a moon princess. You can search on popular fanfiction websites to find such stories.