Physically, of course, there would be obvious changes. But personality - wise, he might become more in touch with his emotions. In the original, Lelouch was often very calculating and hid his true feelings. As a girl, society in the story might expect her to be more open about her emotions, which could force her to confront and express them more.
Lelouch's relationships with other characters would change significantly. For instance, his male friends might treat him differently. Some might become more protective, while others might have a harder time adjusting to the change. His enemies might underestimate him, thinking that as a girl he is less of a threat, but in reality, he would still be as intelligent and strategic as before, just with a new appearance to use to his advantage.
His self - perception would also shift. As a girl, he might start to view the world from a different perspective. He might notice things that he overlooked before, like the specific challenges that women face in the story's setting. This new perspective could make him more empathetic and also change the way he approaches his goals and plans.
One possible plot could be Lelouch, as a girl, using her new identity to infiltrate an all - female organization that was previously off - limits to him as a male. She could use her charm and wits in ways that are different from when she was male, creating unique storylines.
If Freed turns into a girl, his physical movements might become more graceful. He would also have to change his way of dressing, which could lead to a new sense of style. Emotionally, he might become more in tune with his feelings as society often expects different emotional expressions from women.
Aang's relationship with the Air Nomads' spirits could also be affected. As a girl, she might be seen as a new form of the Avatar by the spirits. They could communicate with her in different ways, guiding her on a different path. This could lead to new alliances and ways of using air - bending that were not available to Aang when he was male. Also, her relationship with other female characters in different tribes could become more sisterly, with them sharing secrets and knowledge specific to women.
His personality might become more in tune with some of the social aspects that are often associated with girls. For example, he could become more empathetic. As a boy, Jimmy was very focused on his inventions and his own goals, but as a girl, she might start to notice the feelings of others more. She might also become more communicative in a different way, like sharing emotions more openly.
He could also develop a different sense of confidence. As a girl, Levi might have to rely on different skills and qualities to assert himself. Instead of physical strength, he might focus more on his intelligence and charm. This could lead to a more nuanced and complex character, as he navigates the world with new tools at his disposal.
For Naruto, he might become more protective of Sasuke as a girl. Their friendship could take on a different dynamic, with Naruto being more chivalrous perhaps. Sakura might initially be jealous but then they could form a stronger bond as girls sharing common experiences. Kakashi would probably have to adjust his mentoring style to account for Sasuke's new situation.
His relationship with Midoriya might change. Midoriya could become more protective of Todoroki as a girl, seeing her as more vulnerable. With Bakugo, there could be a different dynamic. Bakugo might initially tease Todoroki more, but as he sees Todoroki still being strong in her new form, he might develop a new respect for her.
If America in Hetalia turns into a girl in fanfiction, her personality might become more nurturing. While the male America was often brash and bold, as a girl she could show more empathy. For example, she might be more patient in diplomatic negotiations, listening more intently to the concerns of other countries.
Saitama's personality might not change that much at first. He's still likely to be laid - back. But he might become a bit more self - conscious about his appearance as a girl. For example, he might start to care more about his hair or the way his clothes fit.
In this fanfiction scenario, Sonic's personality could have some interesting shifts. Sonic as a girl might be more likely to rely on her wits and intelligence in a different way. Maybe she'll use her charm and quick thinking to outsmart villains instead of always relying on her speed. Her sense of humor could also change a bit. She might use more self - deprecating humor or be more sassy. And when it comes to relationships, Sonic could be more open and communicative. For example, she might have deeper conversations with Amy Rose about their feelings and experiences, whereas before as a male Sonic, he was a bit more reserved in that regard.