Well, Bella is the central figure in 'bella the babysitter fanfic'. Then there could be recurring characters like the family she babysits for most often. There might be a single dad in that family who is always running late to pick up his kids, adding some stress to Bella's job. There could also be a best friend of Bella's who gives her advice on how to handle difficult babysitting situations, or a local store owner where Bella buys things for the kids she babysits, and they have friendly chats that add to the story's charm.
Obviously, the babysitter and the 'killer queen' are the main characters. The babysitter is likely an ordinary person who gets caught up in some extraordinary circumstances due to the 'killer queen'.
Bella is the central figure in these fanfics. Then, there could be new characters created specifically for the fanfic. But in terms of the original series, Edward is bound to be there. He'll have to adapt to Bella's new status. Also, Jacob might still be in the picture, perhaps having a more complicated relationship with vampire Bella. And of course, the other Cullens, who will be her family in the vampire world, are main characters as well.
In some Bella Sister fanfic, there might also be side characters like their friends. These friends could play important roles in the sisters' lives, perhaps helping them in their quests or providing comedic relief. Their parents or guardians could also be part of the story, influencing the sisters' decisions and actions.
Obviously, Bella is a main character. Since it's a wereanimal fanfic, there might be an alpha wereanimal character who guides or challenges Bella.
Obviously, Bella is the main character as she is the succubus. There might also be a love interest, perhaps a human or another supernatural being. For example, in some fanfics, there could be a vampire character who becomes intrigued by Bella's succubus nature.
As I don't know the specific 'bella cancer fanfic', it's hard to say for sure. But presumably, Bella would be one of the main characters since she is in the title. There might also be her family members, like her parents or siblings, and perhaps her friends or a love interest who play important roles in the story.
A 'bella the babysitter fanfic' is likely a fan - created story. It could focus on Bella's character development as a babysitter. For example, she might start as a novice and gradually become more confident and skilled. There could also be elements of mystery, like a strange occurrence in one of the houses she babysits at that she has to solve. It could also explore her personal life outside of babysitting, such as her friendships and hobbies.
It really depends on the specific fanfic. There could be her husband, who would be a central character as well. He might be the one that Bella is trying to be the perfect wife for. There could also be friends or family members. Maybe a nosy neighbor who adds some comedic relief or a mother - in - law who has high expectations of Bella. In some cases, there could be a rival character, someone who is jealous of Bella's relationship or her status as the perfect wife.
The main character is likely the babysitter herself. There may also be the children she is taking care of as important characters. And perhaps the parents of the children who hire the babysitter could be part of the main cast as well.
Most likely, the main character is the babysitter. She is the central figure as the story is named after her role. Then there are the kids. They could be of different ages, personalities, which might create different situations for the babysitter. And don't forget the parents. They might be mentioned at the beginning when they leave the babysitter in charge and could come back at the end of the story, perhaps to find out what happened during their absence.