One way the story could be developed is by having Bella be a secret Mikaelson fan in the Twilight universe. Maybe she discovers a hidden book about the Mikaelsons in the Forks library. This could lead to her having strange dreams about them and it might even influence her relationship with Edward. For example, she could start comparing Edward's vampire nature to that of the Mikaelsons.
Well, if Bella Swan is a Mikaelson in fanfiction, it could lead to some really interesting character developments. Maybe she inherits the Mikaelson's power and has to learn how to control it. It also might change her relationships. For example, her relationships with the Cullens in 'Twilight' would be completely different as she now has a connection to the Mikaelsons. This could create a whole new set of conflicts and alliances.
One idea could be a story where Bella discovers the world of the Mikaelsons after being turned into a vampire. She crosses paths with Elijah and they form an unlikely alliance to deal with a common threat in the supernatural world. They learn from each other's experiences, with Bella's knowledge of the Volturi and Elijah's centuries - old wisdom.
Bella Swan's character could be developed by having her explore different aspects of herself. In the context of Greek gods, she might discover a more passionate side of herself, like the passion associated with the Greek concept of eros. This could make her more confident and change her relationships. She could also be developed through her experiences with the Greek gods' powers. If she gets a taste of Athena's wisdom, she could use it to solve problems in Forks that she couldn't before. This would make her a more respected and important figure, not just among the Twilight characters but also among the Greek gods she encounters.
Klaus would probably be very intrigued by Bella. He's used to getting his way with most people, but Bella is not easily swayed. So he might start by trying to charm her, but she would be resistant. For example, he could offer her power or protection, but she would be more concerned about her own values and the people she cares about in Forks.
Research is key. Look into the 'Twilight' series to fully understand Bella's world and the 'The Vampire Diaries' / 'The Originals' universe for Elijah. When writing their relationship, start slow. Maybe they start as reluctant allies. As for the story's setting, you could choose a new location that combines elements of both their worlds, like a small town that has a hidden vampire coven and is also on the verge of being invaded by an ancient evil that only they can stop together. You can also add some secondary characters from both franchises to add more depth to the story.
Well, perhaps the story could be about Kol's twin as Bella Swan trying to find a way back to her own world. Along the way, she has to navigate the complex relationships in Forks. She might befriend some of the characters like Alice in a different way, sharing with her some of the prophetic knowledge she has from her Mikaelson heritage. And when it comes to the werewolves, she could have a more diplomatic approach compared to Bella, due to her experience dealing with different supernatural factions in her own world.
Perhaps there was a time - warp incident. She got stuck in a time - loop or something similar that caused her to experience 2000 years while the outside world moved at a normal pace. This would create an interesting dynamic in the story, as she might be the only one aware of the true passage of time, and she would have to deal with the consequences of her long existence, like the loneliness and the burden of her many memories.
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.
A really interesting storyline could be Bella trying to reconcile her old life in Forks with her new life as a Mikaelson. She might struggle with the differences in values and lifestyles. For example, the Mikaelsons are more into power plays and manipulation in the supernatural world, while Bella was used to the more straightforward (although still complex) relationships in 'Twilight'. This internal conflict could be a major part of the story, along with her trying to find her place within the Mikaelson family and the wider supernatural community.
There is some. However, the quality can vary greatly. Some might focus on a romantic relationship between them, while others could be more about a friendship or an adventure they go on together. It really depends on what you're interested in. You might have to sift through a few to find the ones that really appeal to you.