There could also be a rival fighter. This character would be constantly challenging Bella and trying to outdo her in the underground fighting circuit. Their relationship would be full of tension and competition.
Well, obviously Bella is a main character. Often, there might be a tough trainer or mentor figure who helps her improve her fighting skills. For example, an old and experienced fighter who sees potential in Bella.
Sometimes, there's a love interest. This person might be worried about Bella getting hurt in the fights but also be attracted to her strength and determination. They add an emotional aspect to the otherwise action - packed fanfiction.
The main character is always Bella in this type of fanfiction. However, new characters could be introduced as well. For instance, a blind mentor who has learned to live fully with blindness could be added. This character could guide Bella and help her accept her condition. Or there could be a villain who tries to take advantage of Bella's blindness, which would then lead to a conflict where Bella has to use her wits and other strengths to overcome the villain.
There might be a fanfiction where Bella is part of an underground fighting league that has some sort of mystery or conspiracy behind it. She could be trying to expose the truth while also competing in fights. This would add an element of intrigue and danger to the story.
Often, there's a young wolf who is Bella's best friend in the pack. This wolf might be more impulsive and gets Bella into some fun but also dangerous situations. And there could be an older, more experienced wolf who acts as a mentor to Bella, teaching her about the ways of the pack.
Obviously, Bella is a main character. She is often the center of the story, dealing with issues related to her curvy body. Sometimes Edward might also be a main character, especially if the fanfiction is set in a Twilight - inspired universe and their relationship is explored in the context of Bella's body image.
The main character is Bella, of course. Then, there are the clients or guests that come to the house where she works. These characters can bring in new plotlines. For instance, a mysterious traveler who arrives and seems to know something about Bella's past. Also, there may be a head maid who is in charge of Bella and all the other maids. This head maid can be either kind and nurturing or strict and overbearing, which greatly affects Bella's experience as a maid in the story.
The bella sisters are the primary characters. In addition to them, there might be a wise old mentor figure who guides them in their adventures or challenges. There could also be a rival character who creates obstacles for the sisters, making the story more interesting and full of tension.
In strong bella fanfiction, Bella is the central figure. Other characters like Alice might play important roles too. Alice's visions could be used in a different way, perhaps to help Bella in her new strong persona. Carlisle could also be involved, especially if Bella's new strength has something to do with the vampire lore. And of course, there could be new original characters created by the fanfiction author to interact with Bella in her journey of strength.
Well, of course, Bella Magic herself is a main character. She's usually at the center of the story, driving the plot forward with her actions and decisions related to her magic.
Another common character is a female biker friend, say, Lily. Lily and Bella become really close friends. They go on rides together, share their stories, and support each other. In some fanfictions, there might also be a rival biker, someone who challenges Bella's place in the biker community.
Well, obviously Bella and her child are main characters. The child could be a little girl or boy with unique features. Edward also often plays a major role as the father. Sometimes other Twilight characters like Jacob might also be involved, perhaps having a special relationship with Bella's child.