One common theme is self - discovery. Harry has to figure out who he is when he has these new feelings about his gender. Another theme is acceptance, both from himself and from the people around him, like his friends and teachers at Hogwarts.
Many fanfictions with this premise also have a theme of friendship. How will Ron and Hermione support Harry? Their reactions and the way they grow in their understanding of Harry's situation are often central to the story. Also, there's often a theme of dealing with prejudice, as not everyone in the wizarding world may be accepting at first.
A theme that often comes up is the exploration of magic in relation to gender. For example, how certain spells or magical items might help or hinder Harry in his journey to become a girl. It's also about breaking gender norms in the magical world which is a very interesting aspect.
One common theme is the power dynamic. Bellatrix is a powerful and somewhat deranged Death Eater, and Harry is the Chosen One. So, there's often a play on the contrast of their powers and how they interact. For example, some fanfictions explore how Bellatrix might try to corrupt Harry's power for the Dark Lord or for her own gain.
One common theme is the exploration of their relationship. It might show Ginny's deepening feelings for Harry and how she tries to get closer to him. For instance, in some stories, Ginny might be shown as being very protective of Harry during difficult times at Hogwarts.
Well, a major theme is acceptance. How his friends and the people around him accept or react to his new appearance as a girl. Some fanfictions also focus on the challenges he faces. For instance, he might face discrimination or different treatment just because he looks like a girl now. And there's also the theme of self - discovery. As he steps into this new role, he discovers new strengths and weaknesses within himself that he might not have known before when he was just presenting as a boy.
Another theme is the search for identity. When a girl wants to be a vampire, she is often not satisfied with her current human self. In fanfics, she may feel like an outsider in the human world and believes that becoming a vampire will give her a new and more exciting identity. This can involve changing her appearance, her social status, and her relationships.
One common theme is redemption. Itachi has done many controversial things in the Naruto series, and in these fanfictions, his want for Naruto could be part of his journey towards redemption. He might see something in Naruto that makes him strive to atone for his past sins.
One common theme is redemption. Snape, with his complex past, might find redemption through his relationship with Hermione. Another is the breaking of stereotypes. Hermione is a Muggle - born and Snape has his own prejudices which are overcome.
One common theme is unrequited love. Piper might be longing for Percy, but he could be oblivious or in a relationship with someone else. Another theme could be friendship conflict. Since Piper and Percy are part of the same group in the Percy Jackson universe, her feelings for him could create tension within the group.
The theme of hidden emotions is prevalent. Snape is a very reserved character in the original books. In fanfictions where he admires Harry, his emotions are often hidden beneath his stern exterior. These stories explore how those emotions gradually surface and how Harry responds to this unexpected side of Snape.
One common theme is Harry's resilience. Despite Vernon's abuse, he manages to find strength within himself. For example, in many fanfictions, Harry uses his magical abilities not just for defense against external threats in the wizarding world, but also as a way to cope with the emotional abuse from Vernon.
One popular theme is the exploration of their relationship beyond friendship. How they might fall in love and deal with the challenges in Hogwarts. Another theme is them going on adventures together that are not part of the original books.