Well, in the 'bart breaks his arm fanfic', perhaps there would be a lot of chaos at home. His family would be worried sick. Marge might be running around trying to find the best doctor, while Homer would be fumbling around trying to comfort Bart. Lisa could be trying to keep Bart's spirits up by reading to him or something.
Well, it could be about how Bella copes with the pain and inconvenience of a broken arm. Maybe she has to rely on others more, like her friends or family, to do simple tasks.
If your daughter breaks her arm, the first thing is to keep her calm and still. Then, call for medical help immediately. Don't try to move the broken arm too much on your own to avoid further injury. Once at the hospital, the doctors will take X - rays to determine the severity of the break and decide on the appropriate treatment, which may include setting the bone and putting on a cast.
Obviously, Bart would be one of the main characters since he's the one who breaks his arm. His family members like Homer, Marge, and Lisa are likely to be main characters too as they would be involved in his care and recovery.
Her friends could be main characters. They might be the ones helping her out, like bringing her schoolwork when she's unable to go to school because of her broken arm.
One great fanfiction with this theme could be 'Hermione's Close Call' where Fred is constantly by Hermione's side after she has a near - arm - breaking accident during a Quidditch match gone wrong. It shows his concern in a really sweet way.
First, consider the role the OC will play. If it's a partner for Genos, think about their combat abilities. For example, if Genos is mainly a physical fighter, the OC could be a support with long - range attacks or healing powers.