One idea could be that as America turns into a girl, there are cultural misunderstandings within the Hetalia world. For example, other countries might treat her differently based on gender stereotypes. Maybe she has to fight harder to be taken seriously in diplomatic meetings. Another plotline could involve her exploring her new identity and how it affects her relationships with other characters like England, who might have a very different dynamic with her now.
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.
Well, one possible plot could be that the other characters in Hetalia are initially shocked. They then have to take care of baby America. Maybe they struggle with things like feeding him, changing diapers. And as they do so, they might discover new sides of America's personality that were hidden before.
England could be one of the main caretakers. Despite their past differences, he would feel a sense of responsibility. Another could be Canada. Since they are related, Canada would surely step in to take care of his baby brother.
Well, one possible plot could be that Prussia, now as a girl, has to navigate the world of international relations in a different way. Maybe other countries would react with shock at first and then gradually get used to this new Prussia. She might also have to deal with new emotions and how to present herself in a more feminine way while still maintaining her Prussian pride.
Well, one possible plot could be that Italy's transformation into a girl causes chaos among the other nations at first. They are all used to his male self. But as time goes by, they start to see the new 'her' in a different light. Maybe 'she' brings a new perspective to diplomatic meetings or cultural exchanges. For example, the way 'she' approaches cooking and art might change a bit, adding a feminine touch to things that were previously more masculine in the eyes of the other nations.
Germany might be really confused at first. He's used to Prussia as his older brother figure, so seeing Prussia as a girl would be a big shock. He might be a bit protective in a different way than before. Italy would probably be very excited and might even start flirting a bit. He's always been a bit of a ladies' man, so he'd be intrigued by this new female Prussia.
Well, it could be about many things. It might explore a scenario where America in the Hetalia universe snaps, perhaps due to political stress, international conflicts, or personal issues. Maybe it shows a darker side of the usually upbeat America character, with different reactions from other nations in the Hetalia world.
Her personality might not change drastically at first. England is known for being reserved and proud. As a girl, she could still be those things, but perhaps be more in touch with her emotions. For example, she might be more likely to show when she's hurt or offended instead of bottling it up like she might have as a male.
Germany would likely be a main character. He has a close relationship with Italy in the original series, and Italy's transformation would surely affect their dynamic. He might be confused at first but then grow to accept and support Italy in this new form. Another could be Romano. As Italy's brother, he would have a very strong reaction to Italy's change. He might be overprotective or even a bit jealous if other countries start to show too much interest in his now - female sibling.