Edward and Bella are the top ones. Their love story has a huge fan base, and in fanfiction, writers often delve deeper into their characters. Jacob also remains popular. Even though his relationship with Bella has changed, his loyalty to her and his role in the werewolf pack make him an interesting character to write about. Also, the Cullen family members like Alice are popular as they add more depth and mystery to the stories with their special abilities.
One popular original character could be a new vampire who becomes a close friend to Bella and Edward. This character might have a tragic backstory that makes them interesting. For example, they were turned against their will and are now trying to find a new purpose in their undead life.
Jacob could be an interesting addition. He might show up unexpectedly, and his presence could create some tension between Bella and Edward. His wolf nature could also interact in an interesting way with the vampire - dominated environment of their honeymoon. For example, he could sense some hidden danger on the island that the vampires are oblivious to.
Harry Potter himself is often a very popular character in such fanfictions. Since it's a crossover of sorts, readers are interested to see how he fares in the Breaking Dawn world.
Alice is often a popular character. In high school fanfiction, she might use her ability to see the future to help Bella and Edward avoid potential problems, like a surprise attack from other vampires or getting caught by the school authorities doing something vampire - related.
Alice is often a very popular character. Her ability to see the future can add an interesting element to the wedding planning. For instance, she might foresee some problem with the wedding dress or the weather on the big day and try to prevent it. Jacob also makes an appearance in some fanfictions. His presence can create some tension as he still has feelings for Bella.
Alice is often quite popular. She has the ability to see the future, which can add a lot of interesting twists to the story. For example, she might see a danger coming towards Bella and Edward and try to prevent it. Her quirky personality also makes her a favorite among fans.
I think Carlisle also has a certain popularity in Renesmee, Bella and Edward fanfiction. As the head of the Cullen family, his wisdom and his way of leading the family are often explored. And his relationship with Edward and how he influences Renesmee's upbringing can be a focus in some stories. Esme, too, can be popular as she represents the motherly figure in the family.
Renesmee is often a popular character. Writers like to explore her unique existence as a half - vampire, half - human. They might develop her character further, showing her growing up and dealing with the challenges of her dual nature.
One interesting plot could be Bella exploring her new vampire powers in more depth than in the original. For example, she discovers unique ways to use her speed and strength that no other vampire has thought of. Another plot might involve Edward and Bella facing a new threat to their family that is specific to their situation as a vampire - human - vampire family. It could be a new type of vampire with different abilities that challenges their way of life.
The Cullen family members are also quite popular. For instance, Alice, with her ability to see the future, can be a key character in many fanfictions. Her visions could lead to all sorts of interesting plot twists, whether it's warning about a coming danger or seeing a new opportunity for the family.