The main themes include heartbreak and growth. Heartbreak because Bella is devastated when Edward leaves. Growth in terms of her becoming more independent. She starts to understand the world around her better, not just through Edward's eyes. And there's the theme of loyalty as well, loyalty to her feelings for Edward even when he's gone.
Bella Swan herself is of course very important. Then there's Edward Cullen, even though he's absent for a large part of the book, his presence still looms large over Bella. Jacob Black is also crucial as he becomes a major part of Bella's life during Edward's absence. And the Cullen family members, like Alice, who has a special connection with Bella.
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.
Another theme could be the idea of unexpected alliances. Since they are from different fictional universes, when they come together, they have to rely on each other. This can show how characters with different abilities and personalities can work together towards a common goal, whether it's saving a world or just surviving in a strange new place.
Perhaps it's a human with a very strong psychic ability. He is drawn to Bella because he can sense her connection to the supernatural. Their relationship could be based on mutual understanding of the secrets they both hold, and Bella might find his normalcy in some ways refreshing compared to her previous relationships with vampires and werewolves.
One common theme is the struggle between Jacob's wolf nature and his love for Bella. Since he's a werewolf in New Moon, this creates a lot of internal conflict.
The themes often revolve around love and sacrifice. Just like in the original 'New Moon', Bella's love for Edward is a central aspect. But in fanfiction, it can be taken to different levels. For instance, she might sacrifice more or less depending on the story's plot. Another common theme is the discovery of secrets. Bella may uncover hidden vampire secrets or secrets about her own family. This adds an element of mystery to the fanfiction. Also, the theme of identity is there. As Bella is caught between the human and vampire worlds, she struggles with her own identity, which is often explored in fanfictions.
One common theme is 'alternate universes'. Writers often explore what would happen if Bella made different choices or if the Twilight world had different rules. Another theme is 'power discovery'. Many fanfictions focus on Bella finding new powers or abilities she didn't have in the original story. 'Love triangles' are also common, where Bella may be caught between different characters in new and interesting ways.
Family interference is often a theme. Their respective families might not be too happy about their relationship. For Bella, the Cullens might have concerns, and for Rebekah, her Mikaelson siblings could have opinions. This can lead to conflict and drama in the fanfiction. Also, self - discovery is a theme as they both learn more about themselves through their relationship with each other.
It could be about Bella Swan discovering her true identity as a moon princess. Maybe she has some special powers related to the moon that she has to learn to control.
One great alternative theme could be 'Bella Swan and the Mysterious Newcomer'. This can create a story full of mystery and intrigue as Bella interacts with a new character in her town. It gives room for character development, relationship building, and a plot that can be both exciting and positive, far from the negative connotations of the original title.