I really liked a fanfic where Bella's twin sister was a werewolf. It added a whole new layer to the story. Instead of being drawn to the Cullens like Bella, she was more involved with the werewolf pack. It explored how she tried to keep her identity a secret from Bella at first, which led to some really tense and exciting moments.
A common trope is the twin having a different supernatural ability. For example, she might be able to control the elements while Bella has her mind - shield. Another is the love triangle, but instead of Edward - Jacob - Bella, it's between different characters involving the twin. Often, the twin also has a secret she's keeping from Bella which drives the plot.
You can start by giving her a distinct personality. If Twilight is studious and a bit reserved, make the sister more carefree and impulsive. Maybe she has a passion for art or music that sets her apart. Her appearance could also be different in a subtle way, like a different shade of mane or a unique cutie mark.
Yes, there are likely fanfictions out there with this concept. Fanfiction writers often come up with unique crossovers, and the idea of Bella Swan from 'Twilight' being Elsa's twin sister is a creative and out - of - the - box concept that could be explored in fan - created stories.
One common theme is sisterly love and loyalty. These stories often show the twins supporting each other through thick and thin. For example, in many fanfictions, when one sister is in trouble, the other will go to great lengths to help.
One common theme is family dynamics. Since it's about Bella's sister, it often explores how the sister fits into the family structure, especially with Bella being so central in the original Twilight story. Another theme is love triangles. Just like in the original, but now with the sister involved in some way.
When it comes to the other Cullens, like Alice, Kol's sister could be both intrigued and a bit dismissive. Alice's visions might seem like a novelty to her at first, but then she could start to resent them if they interfere with her own plans. And with Jacob, she might be amused by his werewolf nature. She could see him as a more natural predator compared to the 'tame' vampires of the Cullens. Overall, her interactions would be a mix of curiosity, rivalry, and in some cases, friendship.
One possible plot could be that Bella's discovery of being Aro's twin sister completely changes the dynamic in the Twilight world. Maybe she has some of Aro's powers, like the ability to read minds to an extent. This could lead to her being a target for other vampires who fear her new - found powers and connection to the Volturi.
One interesting aspect is the clash of two different fictional universes. The Twilight universe of Bella and the Vampire Diaries universe of Klaus collide, creating unique scenarios. For instance, how Bella's more 'human - centered' view might contrast with the Mikaelsons' more cut - throat vampire ways.
Once upon a time, Bella's twin sister, let's call her Ella, arrived in Forks. Jasper was immediately intrigued by her unique scent and calm demeanor. Ella, on the other hand, was drawn to Jasper's old - world charm. One day, while walking in the forest, they accidentally met. Jasper was hesitant at first, but Ella's warm smile put him at ease. They started to talk, sharing stories about their pasts. Jasper told her about his time as a Confederate soldier, and Ella told him about growing up away from Forks. As time passed, they became closer and closer, their relationship growing into a deep and meaningful bond.