Another plotline could involve Madara's relationships. As a girl, her interactions with other characters, especially those who knew her before the transformation, would change. Maybe there would be some romantic interests that develop in unexpected ways. Her old friends might have a hard time adjusting to the new her, and this could create some interesting character dynamics.
Her fighting style might become more fluid. Since female bodies tend to be more flexible in general, she could incorporate more acrobatic moves into her combat. For example, she might use her agility to dodge attacks more easily and perform quick counter - attacks from unexpected angles.
First, you need to establish the reason for the transformation. It could be a magical spell gone wrong, or some kind of strange dragon - related phenomenon. Then, focus on how Hiccup adjusts to her new body. She'll have to deal with different physical abilities and limitations. For example, she might be physically not as strong as before, but more agile in some ways.
A fanfic could explore how Hiccup's transformation into a girl affects his friendships. Astrid might react in a complex way. At first, she could be jealous or confused, but then they could form a stronger bond. Also, Hiccup's father, Stoick, might have a hard time adjusting to his son becoming a daughter, which could add a lot of emotional depth to the story.
One possible scenario in this fanfic could be that Tony Stark, through some sort of magic or scientific experiment gone wrong, turns into a girl. This could lead to a whole new set of adventures and character developments. For example, his relationships with other characters like Steve Rogers (Stony) would be completely different. He might have to face new challenges in a different physical form, such as how society and his friends would accept him. Also, his own self - perception would change, and he'd have to re - evaluate his identity.
Well, Naruto might first be really confused. He's used to being a boy, so suddenly being a girl would be a huge shock. He might start by trying to understand the physical differences. For example, getting used to different clothing styles. And in terms of his relationships, his friends like Sasuke might react in a strange way at first. But Naruto being Naruto, he'd probably still be as determined as ever. He could use this new form to his advantage in some situations, like using his new appearance to deceive enemies. After all, he has always been adaptable.
Well, in a 'freed turns into a girl' fanfic, the plot might start with an experiment gone wrong. Freed was perhaps trying to enhance his magic power and something in the experiment caused his physical form to change to that of a girl. He would have to deal with the reactions of his guildmates. Some might tease him, while others would be more understanding. And he would also face challenges like how to adapt to the new body's physical limitations while still being able to participate in guild activities.
The fanfic might also explore how Issei's powers are affected by the transformation. In the original Highschool DxD, Issei has his own set of abilities as a male. But as a girl, he could either have new powers related to femininity in that universe or his existing powers could be modified. This could lead to new battles and challenges where he has to learn to use his powers in a different way.
Well, one possible plot could be that Deku accidentally drinks a strange potion created by a villain. This potion has the side - effect of changing his gender to female. At first, he's shocked and confused. But then, he realizes that he can use this new form to his advantage in hero work. For example, he might be able to infiltrate a female - only villain group more easily. He also has to deal with his friends' reactions, some are surprised while others are supportive and help him adjust to his new body while still being a hero.
Well, perhaps there's a mad scientist in the 'gumball turns into a girl fanfic'. The scientist is testing a new transformation ray and accidentally zaps Gumball. As a girl, Gumball discovers new emotions and ways of thinking. She might also have to face some challenges from the school bullies who are now treating her differently. And then she could team up with her friends to either find a way to change back or to show that she's still the same Gumball on the inside, no matter the outer appearance.