A popular one is 'Fem Harry and the World of Middle - earth'. This fanfic is really interesting because it crosses over the Harry Potter universe with Tolkien's Middle - earth. Here, Fem Harry has to adapt to the very different cultures and magic systems in Middle - earth, and there are some great character interactions that add depth to the story.
Another great option for beginners is 'Fem Harry's First Adventure in Narnia'. This fanfic doesn't go too deep into complex crossovers. It focuses on Fem Harry's journey into the magical land of Narnia. The story is written in a very accessible way, with clear descriptions of both the Harry Potter - like elements and the new Narnia world she discovers.
The theme of identity is also prevalent. The fem Harry Potter has to figure out who she is in a world that has certain expectations. With the crossovers, there are additional factors that influence her identity. She might have to balance her Hogwarts self with the new elements introduced from the other fictional universes she is crossed over with.
One great fem Harry Potter crossover Naruto fanfiction is 'The Potter-Namikaze'. It combines the magic of the Harry Potter world with the ninja skills of Naruto. The story follows a female Harry Potter who somehow ends up in the Naruto universe and has to adapt. It's full of interesting character interactions and unique plot twists.
There's also 'Magic Meets Superpowers: Fem Harry Potter x Avengers'. This one dives deep into how the two universes' rules work together. The fem Harry Potter character has to adapt to the new world while also showing the Avengers what magic can do. It's full of unexpected twists and turns that keep you hooked from start to finish.
One great 'Fem Harry Potter Marvel Crossover Fanfiction' is 'The Witch and the Shield'. In this story, the female version of Harry Potter finds herself in the Marvel universe. It has an interesting plot where she teams up with the Avengers. Her magic skills add a new dimension to their battles against villains.
One great fem Harry Potter NCIS crossover fanfiction is 'The Wizard in the Navy'. It has an interesting plot where fem Harry, with her magical abilities, gets involved with the NCIS team. Her unique skills help solve some rather strange cases that have a touch of magic involved. The character interactions are well - written, especially between fem Harry and Gibbs.
One common theme is the clash and combination of different power systems. The magic from Harry Potter and the chakra - based abilities in Naruto are often explored in terms of how they interact. For example, a fem Harry might try to use a spell in the Naruto world and see unexpected results.
There's also 'Sherlock in Hogwarts'. In this fanfic, Sherlock is somehow transported to Hogwarts. The fem Harry Potter character teams up with him to figure out how he got there and also to solve a series of strange occurrences in the school. It's really interesting to see how Sherlock's logical thinking clashes and then meshes with the magical way of thinking in Hogwarts.
Power dynamics can be another theme. As Harry is a central figure in the wizarding world, being a lesbian fem Harry can change the power dynamics in relationships. For example, how she uses her power and influence in the wizarding world to fight for the rights of the LGBTQ+ community within the story. This can add a new layer of depth to the fanfiction, making it not just about relationships but also about social change within the magical realm.