Well, in this 'harry hides her gender fanfiction', the plot might take a really different turn. For example, the way Harry approaches magic could change. Maybe in the wizarding world, there are different expectations for female wizards, and hiding her gender allows her to either subvert or conform to those in secret. Also, it could add a layer of mystery to the story, making readers more curious about when and how her true gender will be revealed.
Maybe in this fanfic, Harry discovers a prophecy that is related to her gender. To avoid fulfilling a part of it that could lead to disaster, she hides her gender. In the process, she could form new alliances with female students who are more in tune with her new 'female identity'. She might also face challenges in classes like Defense Against the Dark Arts because the teaching methods are sometimes more tailored to male students in the original Hogwarts setup.
Perhaps some traditional pure - blood families who have strict ideas about gender roles in the wizarding world. They might not approve of Harry's actions of hiding her gender and try to force her to conform to the traditional male identity. They could use their influence in the Ministry of Magic or within Hogwarts to make things difficult for Harry.
It changes the narrative by introducing a new layer of secrecy. Instead of the straightforward story of Harry as a male hero, there's now this hidden aspect that can affect every event. For example, duels might be different if opponents underestimate Harry thinking she's a girl.
She might want to prove herself in a male - dominated ninja world. If she shows herself as female, she could face discrimination or be underestimated. So, hiding her gender gives her a chance to be seen as an equal to male ninjas.
Well, she could start by dressing in a more androgynous way. Maybe wearing loose-fitting clothes that don't give away her feminine shape. Also, she might try to lower her voice or use certain speech patterns that are more associated with males in that fictional world.
Well, it can change her relationships. For instance, she might be treated differently by male characters in the Muggle world compared to how Harry would have been. In romantic relationships, she may attract different types of partners. Maybe she'll have more female friends who she can bond with on a different level.
For creativity. It's a unique twist on the original story. It allows the author to explore different relationships and how characters would react if Harry had a different gender presentation.
There could be a fanfiction where Harry hides his gender to escape the constant spotlight. He might change his appearance and gender identity to live a more normal life at Hogwarts, away from all the expectations. In this type of story, he could make new friends who see him as this new identity and form unique relationships.
In many fanfictions, the choice of animagus form often reflects the character's personality. If female Harry is hiding in her animagus form, it could be a form that represents her need for freedom and escape. For example, a bird. A bird can fly away from trouble and see things from a different perspective, which might be important for her in a difficult situation. She could be using this form to gather information without being noticed.