Often, there's a theme of hidden powers or abilities. Even as a human, Jasper might have some remnants of her previous self. This could be in the form of enhanced senses or a special intuition. Fanfiction writers like to explore how she uses these to her advantage or how she tries to hide them from others in the human world.
One common theme is the exploration of forbidden love. Since Jasper has his own complex backstory and Bella is human, their relationship often faces various obstacles that make their love seem forbidden.
Love is a very common theme. Their relationship as humans is often explored in a romantic way.
One major theme is acceptance. Jasper has to accept Alice's human nature with all its weaknesses and Alice has to accept Jasper's vampiric nature. Also, the theme of danger often comes up. Since Jasper is a vampire, there are threats from other vampires or vampire - related elements that endanger Alice.
Love is a very common theme. Since it's about Jasper and Bella, their relationship and the development of their love for each other are often central to the stories.
One common theme is friendship. Writers often explore how Edward and Jasper's friendship evolves over time, especially considering their different personalities and abilities. For example, they might write about how they support each other through difficult times.
One common theme is loyalty. Since they are part of the same vampire coven in the Twilight series, many fanfictions explore how loyal they are to each other and the lengths they will go to protect one another.
Another theme is the power dynamic. Jasper has his special abilities and Bella has her own charm. Fanfictions may play with how these two aspects interact and influence each other. For example, in some stories, Bella's humanity affects Jasper's view on his vampiric nature.
A prevalent theme in jasper and bella fanfiction is the struggle against the odds. They come from different backgrounds and have different natures within the Twilight universe. Fanfictions often focus on how they overcome these differences. Also, themes of loyalty and sacrifice are common. They might be in situations where they have to be loyal to each other and make sacrifices for their relationship or for the greater good of their vampire - human world.
One common theme is loyalty. Jasper's loyalty to Cruella is often explored, whether it's tested or reaffirmed. Another theme is transformation. For example, Cruella might start to show a softer side or Jasper might grow more independent.
One common theme is friendship. Despite their differences, they often form a deep bond in fanfiction. For example, they might support each other through emotional hardships.