She could be an original character created by the fanfiction writer. A normal girl who just happened to be in the wrong place at the wrong time, like near a fight between Spider - Man and a villain.
Perhaps the girl is a villain who gets shot during a fight with Spider - Man. This could lead to a change of heart for her as she lies there injured, realizing the error of her ways. It might also cause Spider - Man to question his own actions and if there could have been a better way to handle the situation.
Doc Ock could also be a great antagonist here. He could be after some new technology or power source, and Spider Man and Spider Girl get in his way. He might use his mechanical arms to try and capture them or stop them from interfering with his evil schemes. Plus, his intelligence makes him a formidable foe for the two spiders.
Well, one possibility could be that they team up to fight a new super - villain in the city. Maybe this villain has some special powers that require both of their unique skills to defeat.
One interesting character could be Peter Parker's aunt. She often provides a grounding force in his life and her reactions to the new girl could add depth to the story. Another might be one of Spider - Man's villains, like Green Goblin. His presence can create conflict and tension in the fanfiction, especially if he targets the new girl to get to Spider - Man.
Well, it could be about them teaming up to fight a new supervillain in the city. Maybe they start off not getting along because they have different fighting styles, but then they learn from each other and become great partners.
One possible plot twist could be that as Spider - Man turns into a girl, he (now she) has to deal with different social expectations. For example, the male - dominated superhero world might react differently to a female version of Spider - Man. Maybe she would face more scrutiny or different types of challenges from the media or other superheroes. Another aspect could be her relationships. Peter Parker's friends and family might have a hard time adjusting to the change, and his romantic interests could take a whole new turn. For instance, his previous female friends might see him in a new light, or he might attract different kinds of admirers as a girl. Also, the way she uses her powers could change. Maybe she would be more graceful or use her femininity in combat in a way that's different from the traditional male Spider - Man.
In fanfiction, anything can happen. Writers often like to take creative liberties. Maybe they rewrite Spider Man's origin to include a female identity. For example, they could change Peter Parker's backstory to be a girl with similar spider - like abilities.
One possible villain could be Doctor Octopus. He might be back with some new and improved mechanical arms, and he wants to prove that he's the superior scientist and villain by defeating both Spider Man and Spider Girl.
Well, obviously Spider - Man and Squirrel Girl themselves are very popular. But sometimes other characters like Spider - Man's friends like Ned or MJ can also be important in the fanfictions. They might add some extra drama or support to the main story between Spider - Man and Squirrel Girl.
Well, it's hard to name the absolute best, but some writers are known for their creative takes. For example, [writer's name] has a really interesting way of portraying Squirrel Girl's personality. Their stories often have a lot of humor and heart. Another good writer is [another writer's name], who focuses more on the action - packed adventures of Spider - Man and Squirrel Girl together. They really know how to write intense fight scenes.