Bella is obviously one of the most popular. Since she is the main character in the original series, in fanfiction she often remains the central focus. Her relationships with the Cullens, especially Edward, are often explored in great depth.
Alice is quite popular too. Her ability to see the future makes for some really interesting plot twists in fanfiction. Writers might have her use her power in new ways, like trying to prevent a disaster that she foresees for the Cullen family, or using it to help Bella in unexpected situations.
Jacob might also be a popular character in some of these fanfictions. His relationship with Bella in the original series was complex, and in fanfiction, it can be further explored, even in the context of Bella and Edward's relationship, creating a sort of love triangle - like dynamic.
Bella is obviously one of the most popular characters as she is the central figure in the original 'Twilight' series and in this fanfiction as well. Her relationship with both the vampire and wolf elements is what drives much of the story.
Edward is also a fascinating character. His struggle with his vampire nature and his growing feelings for Bella can be explored in more depth in the fanfiction. Maybe we'll see new aspects of his character, like his relationship with his vampire siblings in the context of Bella being in their lives.
Obviously, Bella and the Cullens are the main characters. Bella is the human girl who enters their world. And the Cullens include Edward, who has a special connection with Bella. Then there's Alice, who might be able to see the future and could play an important role in Bella's interactions with the family. And of course, Carlisle, the head of the Cullen family.
One interesting plot could be Bella developing a new power while living with the Cullens. For example, she might gain the ability to communicate with animals like some of the other vampires. This would add a new dynamic to her relationship with the Cullens and also pose new challenges and adventures as they try to keep it a secret from the outside world.
The Cullens play a major role. Carlisle, the kind - hearted patriarch of the family. Esme, the loving mother figure. Jasper, who has his own unique vampire powers. And of course, the protagonist who is growing up with them, whose experiences and interactions with the Cullens drive the story forward.
Her relationship with Jacob would likely change. Since she hates the Cullens, she might turn more towards Jacob for support. They could become closer as she sees Jacob as an alternative to the Cullen world. With her human friends, she might try to distance herself from any connection to the Cullens. So, she could be more secretive or withdrawn from them as well to avoid any talk about the Cullens.
The court jester can also be quite popular. They bring a sense of humor and light - heartedness to the often - serious world of Royal Twilight. Their antics and their ability to see through the pretenses of the court can be very appealing.
In twilight and friends fanfiction, Spike is also a very beloved character. He has a special relationship with Twilight, and his dragon - like qualities make for interesting storylines. Also, Rarity is popular for her glamorous and sometimes diva - like personality. Fanfiction writers often use her to create stories full of drama, fashion, and high - society - like situations within the twilight world.
Klaus from The Originals is often very popular. His complex personality, being both a villain and a character with a tragic past, makes him a great addition to fanfiction. He can bring a sense of danger and unpredictability to stories that involve the Twilight characters.