Yes, there are some interesting ones. You can start by looking on popular fanfiction websites like Archive of Our Own. Some stories might focus on how fem Harry navigates the magical world with her new identity as Lady Peverel, adding new plot twists and character developments to the familiar Harry Potter universe.
One common theme is identity. Fem Harry has to deal with being both Harry and Lady Peverel, and how these two identities interact. Another theme could be power, as she might gain new powers or a different status as Lady Peverel.
Yes, there are likely some fanfictions out there with this concept. Fanfiction platforms often have a wide variety of creative and unique ideas, and the idea of a female Harry being a fan of Lady Lefay is an interesting one that could attract many writers.
Well, it depends on what you consider 'good'. There are fanfictions that delve deep into the lore of the Peverell family and how Fem Harry fits into it. For example, some stories might explore the magical abilities that Fem Harry inherits as a result of being related to Lady Peverell. They might also look at how this new aspect of her identity affects the overarching plot of the Harry Potter universe, like her role in the fight against Voldemort or her place in Hogwarts. You really have to explore different works to find the ones that suit your taste.
She becomes more confident. In these fanfictions, as fem Harry takes on the Dark Lady role, she no longer doubts herself like she used to. For example, in many stories, she used to be shy about using her magic, but as the Dark Lady, she wields it with great confidence.
One great fem Harry Potter Lady Black fanfiction is 'The Black Heir'. It has an interesting take on a female Harry being related to the Black family. The story is full of mystery and adventure as she discovers her heritage within the Black family and the wizarding world.
One common theme is identity. Fem Harry has to come to terms with being related to Lady Peverell and how that shapes who she is. Another is power, as being a Peverell might bring new magical powers or abilities.
Well, often there's a theme of acceptance. Fem Harry has to be accepted by the Ravenclaw house, and also she has to accept herself in this new role. Also, there can be a theme of power. Since Lady Ravenclaw was a powerful witch, fem Harry might inherit or discover some special powers associated with that. And then there's the theme of friendship. She'll form new friendships within Ravenclaw house and also maintain some old ones, but they might be different because of her new identity.
Draco Malfoy is likely to be a main character as well. Given his importance in the Slytherin house, his interactions with Fem Harry, whether they be friendly, rivalrous or something in between, would be crucial to the story. Also, other Slytherin students who either support or oppose Fem Harry's leadership could be main characters. For instance, Blaise Zabini might play an important role, either as an ally or a foe, depending on how the story unfolds.
One possible plot could be that fem Harry discovers a hidden connection to Lady Lefay. Maybe she finds an old diary or a magical artifact that leads her to learn more about Lady Lefay. As she delves deeper, she starts to gain new magical abilities inspired by Lady Lefay.