I'm not sure as I haven't read that specific fanfiction. But generally in a fanfiction, Bella being the daughter of Trigntins would likely mean she has a special role within the story's universe created by the fanfic writer.
Yes, perhaps in this fanfiction Bella could be a new Avenger. Fanfictions often introduce new characters or give existing characters new roles within the established Avengers universe.
They could start by sharing their dreams and fears. For example, Bella could tell Hunter about her insecurities in the cheerleading world, and Hunter could open up about his pressure in football. This would create a deeper emotional connection. Another way is through joint adventures like going on a road trip for a football game in another town and facing various challenges together on the way.
It's possible that in the fanfiction, Rennee has her own backstory that makes her act mean towards Bella. For instance, she might have had a bad experience in the past that makes her distrust or dislike people like Bella. Another reason could be that the writer wants to create drama and conflict, and making Rennee mean to Bella is an easy way to achieve that. This can add tension to the story and make it more interesting for the readers.
In fanfiction, their relationship might start to develop when they have to face a common enemy. Let's say there's a rival football team that tries to play dirty against them. Bella and Zach would need to rely on each other's strengths, Zach's physical skills on the field and Bella's strategic thinking. As they work together to overcome this threat, they start to respect and like each other more. This respect could then turn into deeper feelings as they spend more time together off the field too, like studying together for school or just hanging out with friends. They might start to notice little things about each other that they find endearing, like the way Zach always ties his shoelaces in a double knot before a game or how Bella bites her lip when she's thinking really hard about a play. And slowly but surely, their relationship would grow from just being teammates to something more special.
There could be a female character, Sofia, who is another member of the mafia. She sees Bella as a threat at first, thinking she'll steal her position or the attention of the men in the mafia. But as time goes on, they might form an unlikely alliance. There may also be a young and ambitious mafia underling named Antonio, who is always looking for ways to climb the ranks and his actions often impact Bella's situation in the story.
She could meet soldiers coming back from World War I. These soldiers would have their own stories of war and survival, and Bella might be drawn into their tales.
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.
One great 'bella is bella is blind fanfiction' story could be one where Bella's blindness leads to her developing extraordinary other senses. She might be able to sense people's emotions more acutely, like she can tell when someone is lying just by the change in their voice or the way they move around her. Another could be a story where she discovers a new power within herself because of her blindness, perhaps a psychic ability that helps her in some way, like predicting danger.
Her best friend could be the first one to help. They might notice the signs of malnourishment like her pale skin and lack of energy. They start by sharing their lunches with her at school.