A theme that is quite prevalent is the idea of belonging. The oc, who is an outsider in the world of Harry Potter at first, finds a sense of belonging with female Harry and her friends. Also, the theme of sacrifice can be seen. Sometimes, either the oc or female Harry has to sacrifice something for the sake of their relationship or the greater good in the wizarding world.
One common theme is self - discovery. The OC often has to figure out their place in the wizarding world. Another is friendship, as they make new friends like the main characters in Harry Potter. For example, they might become friends with Harry, Hermione, or Ron.
Friendship is also a big theme. These OCs usually form bonds with Harry Potter and his friends. Their friendships are often tested by the OC's family background. For instance, Harry and his friends might be initially suspicious of the Black OC because of the family's reputation, but as they get to know the OC better, they realize they are more than just their family name and form strong friendships. This theme of overcoming prejudice through friendship is quite common in such fanfictions.
One common theme is self - discovery. The oc often discovers new things about themselves while interacting with the fem Harry Potter character. Another theme is friendship. They build a strong bond that helps them face the challenges in the wizarding world.
One common theme is the discovery of the magical world. The Muggle OC usually starts off not knowing about magic and then has this amazing journey of discovery. Another theme is the clash of cultures, between the Muggle world and the wizarding world.
One common theme is the struggle of the vampire OC to fit into the wizarding world. Since vampires are not a common part of the Harry Potter universe, they often face prejudice and have to hide their true identity. Another theme is the power dynamic. Vampires are usually depicted as having unique powers, and how they use or misuse these powers in the context of the wizarding world is often explored.
One common theme is self - discovery. The oc often has to figure out their place in the wizarding world while being with female Harry. Another theme is friendship evolving into something more. They start as friends or allies and then develop deeper feelings. For example, in many fanfictions, they face challenges together that bring them closer.
Love and Romance are very common. Since it's about Sirius Black and an OC, the development of their relationship, from the first meeting to falling in love, is often a central theme.
One common theme is self - discovery. The OCs often have to figure out their place in the wizarding world, like finding out their magical abilities or their family history. It's like a journey of finding who they really are.
One common theme is friendship. Often, the stories start with Fred and the male OC becoming friends first and then the relationship may develop into something more. Another theme is acceptance. The male OC might be different in some way, like having a unique magical ability or coming from an unusual background, and Fred and the rest of the characters learn to accept him. There's also the theme of adventure. Since it's set in the Harry Potter universe, they often go on adventures together, whether it's exploring a hidden part of Hogwarts or going on a quest outside of the school.
One common theme is identity. Since it's a female version of Harry, she often has to figure out who she is in a world that had certain expectations of the male Harry. Another theme is friendship, just like in the original series but with different nuances because of her gender.