In this fanfiction, Bella is likely the main focus. Because the whole premise is about Elena being jealous of Bella, which implies that Bella is at the center of whatever relationship or situation is going on with Damon. Elena's jealousy is directed towards Bella, so the story would probably revolve around Bella and how she deals with Elena's jealousy and her relationship with Damon.
Elena might show her jealousy by being overly critical of Bella. For example, she could constantly find fault in Bella's actions or decisions in the fanfiction.
Well, it could be due to a number of reasons. Maybe in the fanfiction, Bella has some unique abilities or qualities that Elena lacks. And this makes Elena feel envious. Also, if the story portrays Bella as getting more attention from other characters, especially those that Elena values or is interested in, that would surely make Elena jealous.
One possible scenario is when Bella is more successful in achieving a common goal in the fanfiction world. For instance, if they are both after a magical artifact, and Bella gets it first. Another scenario could be that Bella has a closer relationship with a mentor figure, which Elena covets. It might also be that Bella has a more glamorous appearance and gets more admiration from other characters, making Elena jealous.
There could be Bella's mother. She would be an important character as she was part of the relationship that led to Bella's birth. Maybe she has some secrets or reasons for keeping Damon away from Bella all these years.
Damon could be a vampire or some other powerful supernatural being. Bella might be a human, perhaps with some special quality that makes her a target for James. Maybe she has a unique scent or power that she's not even aware of yet.
One possible reason could be that Bella has a certain allure or mystery that Damon finds more captivating than Elena. Maybe Bella represents a new and different kind of challenge for him.
By showing them having heart - to - heart conversations. For instance, late at night when they can't sleep, they talk about their dreams, fears and hopes. This can deepen their understanding of each other.
Bella and Elena are the stars. They might have a mentor figure in the fanfiction, someone who helps them understand their unique situation, whether it's related to their powers (if there are any in the story) or their family secrets. And there could be antagonists too, like a jealous relative or a person who wants to use their special connection for their own gain.
This change would also have an impact on the other characters. Stefan, for example, might be caught in the middle. He has his own relationship with Damon and also cares about Elena. The fanfiction could create a whole new set of alliances and rivalries. Characters from the 'Twilight' series might also be involved in some way, further complicating the relationships. Overall, it would be a big upheaval in the existing relationship dynamics.
Caroline could be in the story. She might be Bella's friend or a rival. If she's a friend, she could help Bella navigate the supernatural world. If a rival, it could be because of her relationship with Damon or Stefan in some way. Also, Klaus could be a character. He might see Bella as a means to get to Damon, or he could be interested in her unique abilities if she has any.