Well, a major theme is the exploration of the supernatural. Since they are vampires, there are often elements of vampire powers, like Edward's mind - reading. Another common theme is the conflict between different vampire clans. This can add a lot of action and drama to the fanfiction. And finally, the theme of sacrifice. Both Edward and Bella are often put in situations where they have to sacrifice something for the sake of their relationship or the safety of others.
Love is a very common theme. Their intense, often obsessive love for each other is a central part of most fanfictions. Another theme is the struggle between Bella's humanity and the vampire world she's drawn into. Also, the idea of family, like Edward's vampire family and how Bella fits into it.
One common theme is the exploration of their love in different situations. For example, in some fanfictions, they face new threats to their relationship, like a new vampire clan that doesn't approve of their union. Another theme is the power dynamics between them. Since Edward is a vampire with special abilities and Bella is a human (at least initially), how they navigate that power difference is often explored.
One common theme is the exploration of power dynamics. Since Bella is a vampire and Edward is human, it changes the traditional power balance in their relationship. For example, Bella may have to protect Edward from other vampires.
Another common theme is power. Edward being a vampire king has power, and Bella's transformation also brings power. Fanfictions often play with how they use or struggle with their powers in relation to their relationship.
Love against all odds is a very common theme. Since they are from different species, there are a lot of obstacles in their relationship. For example, in many fanfictions, Bella has to control her vampire instincts around Edward, which adds a layer of tension.
One common theme is the exploration of their eternal bond. Since they are vampire mates, their connection is supposed to last forever, and many fanfictions focus on how they maintain and strengthen this bond. Another theme is the challenges they face due to their different natures. Bella was once human, and becoming a vampire brings a whole new set of issues. Also, the theme of protecting each other and their family is quite common. They are mates, so they will do anything to keep each other safe.
Another common theme is the struggle between the vampire and human worlds. There are often conflicts arising from the differences in their natures, values, and lifestyles. Fanfiction writers usually show how Edward and Bella deal with these differences and try to find a balance between the two worlds.
Independence is a common theme. Without being tied to Edward, Bella can be shown as a more self - reliant character. She can make her own choices, pursue her own dreams, and not be influenced by the over - protective nature of Edward.
The themes can vary widely. But often, there's the theme of Edward's isolation. Despite being part of a family, he still feels alone in some ways as a vampire. His search for meaning in his eternal life is also common. Some fanfictions also explore the theme of his power as a vampire and how he uses or struggles with it. And his relationship with the human world, whether it's his protectiveness towards humans or his curiosity about their short - lived but vibrant lives, is another recurring theme in vampire Edward fanfiction.
Romance is another big theme. Writers often create new love interests for Edward or explore his relationship with Bella from different angles, adding more depth and drama to their connection.
A common theme is the 'what - ifs'. What if Bella had chosen Jacob instead? Fanfictions often explore this alternative storyline and how it would affect the vampire - human relations in Forks. It can be really interesting to see how the characters develop in this different scenario.