Another theme could be delving deeper into the backstories of minor characters. Like exploring the life of Neville Longbottom's parents before they were attacked. This can give more depth to the overall story and the wizarding world.
One appropriate theme is exploring the friendships further. For example, fanfiction about Harry, Ron, and Hermione's adventures outside of the main events in the books. It could be them traveling during the summer holidays and having different magical experiences.
One appropriate theme is to rewrite certain parts of the story from a different character's perspective. For instance, seeing the events of the Triwizard Tournament from Cedric Diggory's point of view. Or exploring how the wizarding world copes with the aftermath of the Battle of Hogwarts in different regions that were not covered in the original books.
One appropriate theme could be exploring the post - Hogwarts lives of the characters. For example, how they use their magic in the Muggle world or how they contribute to the wizarding society in new ways.
One appropriate theme could be exploring the further adventures of the characters after the main story ends. For example, how Harry, Ron, and Hermione continue to fight dark magic in new forms that emerge in the wizarding world.
Some great appropriate fanfiction themes in the 'Harry Potter' universe include exploring the backstories of minor characters. For example, we could learn more about the lives of the house - elves like Dobby or Kreacher before they came into contact with the main characters. Another theme could be new magical creatures that are discovered in the Forbidden Forest or other areas of the wizarding world.
One positive theme could be exploring the further adventures of the characters after the events of the books. For example, how Harry, Hermione, and Ron continue to fight against the remaining dark forces in the wizarding world. Another theme could be the development of friendships between different houses at Hogwarts, like a Slytherin and a Gryffindor becoming friends and working together.
Some great 'Harry Potter' fanfiction themes include exploring the backstories of minor characters. For example, delving into the life of Luna Lovegood before she came to Hogwarts. What was her family like? How did she develop her unique personality? Another theme could be alternative timelines. What if Harry had been sorted into Slytherin? How would his story and relationships change? There are also themes about the post - war wizarding world. How do the characters rebuild and what new challenges do they face in a world recovering from the battle against Voldemort.
The theme of female characters taking on new roles in the wizarding society is quite popular. For example, a fanfiction could explore what it would be like if a female character became a professor at Hogwarts at a young age. Also, stories about female characters' adventures outside of Hogwarts, perhaps on a secret magical quest, are well - liked.
One of the common themes is time - travel in the 'Harry Potter' universe. Writers might create stories where a character goes back in time to change an event in the wizarding history. Another popular theme is the introduction of new magical creatures that the main characters have to interact with. Additionally, there are fanfictions that explore the family histories of the characters, like the Black family tree and the secrets it holds, all while maintaining a family - friendly and positive tone.
Friendship is a very common theme. For example, exploring the deepening of the friendship between Harry, Ron and Hermione during their adventures at Hogwarts.
One common theme is the further exploration of character relationships. For example, delving deeper into the friendship between Harry, Ron, and Hermione. This could involve creating new adventures that test and strengthen their bond.