One of the main characters might be Alice. Her ability to see the future could be crucial in helping Edward navigate the political and dangerous situations in his role as king. Also, Jasper could be there. His experience in combat and control of emotions could be useful for Edward's rule. And then there's Rosalie, who might have her own opinions on how Edward should run the kingdom and could be a source of conflict or support depending on the story.
Power is a common theme. Since Edward is a king, stories often revolve around how he wields his power, whether it's for good or bad. Another theme is loyalty. The loyalty of his subjects, his friends, and his advisors is often explored.
There are indeed some great ones. A lot of fanfiction writers like to delve into the concept of Edward as a vampire king because it allows for a lot of creativity. They can explore how his vampiric powers might be enhanced in a leadership position, how he deals with the politics among different vampire clans, and also how his love for Bella might be affected or even strengthened in this new scenario.
The character interactions are also unique. You get to see how the Twilight characters like Bella or Edward Cullen might interact with a figure like King Edward. Maybe they would be in awe of his royalty or he might be intrigued by their supernatural abilities. It opens up a whole new world of relationships to explore in fanfiction.
I really like 'Edward's Ascent'. In this fanfiction, Edward's journey to becoming a great king is explored. It shows his growth from a young, inexperienced heir to a powerful and respected ruler. There are also some great sub - plots involving his friendships and rivalries.
One interesting plotline could be Edward's rule over the vampire kingdom. He might face challenges from other powerful vampires who don't want to accept his authority. Another could be his relationship with a human in this new role as king. Maybe he tries to protect her from the more dangerous aspects of the vampire world while still maintaining his position.
There could be a fanfiction where King Edward and Bella are in a time - travel scenario. Maybe they go back in time to prevent a great disaster and in the process, their relationship deepens. They might discover new things about each other that weren't known before.
In fanfiction, King Edward might start as a rather aloof character and gradually open up to Bella. His character development could involve learning to trust and rely on her more.
Power and leadership are common themes. Writers often explore how Edward would handle the responsibilities of being a king, like making decisions for the vampire community.
There could also be other supporting characters in the fanfiction. For example, the king's most trusted advisor who offers him counsel in difficult times. Or perhaps a young page who looks up to the king and queen and plays a small but important role in their adventures.