One idea could be that as a girl, Harry has to deal with different social expectations in the wizarding world. For example, she might face more restrictions on certain adventures compared to when she was male. Also, her relationships with Ron and Hermione could change in interesting ways. Ron might be more protective, while Hermione could become a closer confidant as they share more 'girl - specific' experiences.
Well, perhaps the story could focus on how Harry's transformation into a girl affects his/her relationship with Voldemort. Voldemort might underestimate her at first because she is a girl. But Harry, with her newfound determination and a different approach to magic, could surprise him. She might also form new alliances with female witches who were previously overlooked in the fight against the Dark Lord.
One idea could be that Harry has to hide his new werewolf form from his friends at Hogwarts. He might struggle with the stigma associated with werewolves in the wizarding world, even though his friends know him well. Another could be that he discovers new magical abilities related to his werewolf form that help him in his fight against Voldemort. For example, enhanced senses that allow him to detect dark magic more easily.
Perhaps in the fanfic, Harry is under a spell that turns him into a girl. His friends don't recognize him at first, and he has to find a way to break the spell while dealing with the new - found femininity. He could discover new magical abilities that are related to his female form.
One idea could be that as a girl, Voldemort has to deal with the sudden change in how people perceive her. Wizards who were once afraid of the male Voldemort now underestimate her, which she uses to her advantage to secretly gather power again. Another plot could involve her exploring new emotions that come with the female form, like a different kind of vulnerability, which she initially hates but then learns to use in a manipulative way.
One idea could be that as a girl, Midoriya has to face different social challenges within the hero academy. For example, she might encounter more discrimination in a male - dominated field. Another could be that her relationships with her male friends, like Bakugo, change in unexpected ways. Maybe Bakugo is more protective or more competitive in a different sense.
One idea could be Sasuke, as a girl, having to deal with different social interactions in the ninja world. For example, she might face new forms of discrimination or unexpected kindness. Another plot could involve her love life. Maybe Naruto has a different reaction to her now that she's a girl, and it could lead to a whole new dynamic in their relationship. Also, Sasuke as a girl could struggle with her identity and how it affects her goals of revenge and restoring her clan's honor.
One idea could be that as a girl, Harry has to face different social expectations at Hogwarts. For example, she might be pressured to conform more to traditional female roles in magic, like in potions classes being expected to focus on more 'domestic' spells. Another plot could involve her relationships with male and female friends changing. Maybe Ron has a different kind of protective instinct towards her, and Hermione becomes even closer as they bond over the unique experience of being a girl in a male - dominated magical world.
In this fanfiction scenario, Harry becoming a werewolf could cause a rift in the wizarding community. Some might see him as a threat, while others, like the Weasley family, would stand by him. The story could focus on how he copes with this new identity. He could start to understand the werewolves' perspective more, and try to bridge the gap between the wizarding world and the werewolf community. He might also have to deal with the Ministry of Magic's attempts to control or eliminate him because of his new form.
Well, in such a fanfic, perhaps Sasuke, now a girl, decides to use this new form to his advantage in espionage. He could infiltrate an enemy group more easily as a female. Also, there could be a really interesting sub - plot where he has to deal with his own self - image and acceptance of this new body. He might initially be in denial but then gradually come to terms with it.
One idea could be that as a dragon, Harry uses his new form to protect Hogwarts in a way he couldn't as a human. He could fly around the castle, breathing fire at any dark forces approaching. Another could be that his dragon form has unique magical abilities that are connected to his status as 'God Harry Potter', like being able to see into the future to prevent disasters.
One idea could be a quest where the main character has to rescue a monster girl who is being wrongly persecuted in the wizarding world. Maybe she has a unique power that the dark wizards want to use for evil, and the protagonist, inspired by Harry Potter's courage, sets out to protect her.