Well, perhaps the plot could involve Percy using her unique skills. She might have some kind of superhuman strength or agility. When she joins the Avengers, she could start off as a bit of an outsider. The other Avengers might be initially skeptical of her. But then she proves herself in a big battle, like against a powerful new villain. Maybe she has a special power that helps turn the tide of the fight.
It could be a powerful sorcerer who wants to steal Percy's powers. Since Percy might have some unique abilities, this sorcerer sees her as a key to gaining more power for himself. He could be creating chaos in the city to draw Percy out and then try to defeat the Avengers when they come to her aid.
In fanfiction where Percy joins the Avengers, there are numerous possibilities. He might introduce the Avengers to the world of Greek mythology which they may not be very familiar with. His powers over water could be used to put out fires in a different way than Stark's technology. He could also form a bond with Natasha Romanoff, teaching her some of his sneaky combat moves from his demigod training while she could teach him espionage skills. This could create a whole new dynamic within the team.
One possible plot is that Fem Percy joins the hunt to seek a new purpose. In the story, she could discover hidden powers within herself related to hunting. Along the way, she might form strong bonds with the other hunters, and together they face a great threat that only their combined skills can defeat. For example, a powerful mythical beast that has been terrorizing the lands they hunt in.
She could fit in by being a wildcard. Her abilities are likely not something the Avengers are used to. So, she could be the one to come up with unexpected solutions during missions. For instance, if they're trapped in a place, she might use her powers in a creative way to get them out.
Her character development could be quite complex. First, she'd have to adapt to the rules and values of the hunt. This might mean suppressing some of her more impulsive tendencies that Percy is known for. As she spends more time with the other hunters, she'll likely pick up new skills and ways of thinking. For example, she could learn new tracking methods or ways to communicate without words. Her view of the world may also change as she experiences the hunt. She may come to see the importance of the balance between the mortal world and the world of the gods in a new light, which could shape her actions and decisions in the future.
The 'fem Percy Jackson joins the hunt' fanfiction could be full of exciting twists. Given that Percy is known for his courage and quick thinking, as a female, she would likely carry those traits as well. She may form a strong bond with Artemis, the goddess leading the hunt. This bond could lead to her being given special tasks or privileges within the hunt. She might also have to deal with the internal politics of the hunt group, which could be a whole new area of conflict for her compared to her normal adventures.
Obviously, Fem Percy would be one of the main characters. There would probably also be the leaders or prominent members of the hunt. Maybe some characters from the original Percy - related stories could also make appearances in different roles, like her friends who might be worried about her new path in the hunt.
One great fem Percy Jackson and the Avengers fanfiction is 'Percy in the Avengers Tower'. It has an interesting plot where fem Percy is brought into the Avengers' world and has to deal with both her demigod powers and the new superhero environment. The interactions between her and the Avengers are really well - written.
She might bring in her unique skills. For example, if she has water - based powers like in Percy Jackson lore, she could be useful in various situations. Maybe she could help put out fires during battles or use water to create diversions. Also, her combat skills, which might be different from the typical Avengers, could add a new dynamic to the team.