Well, magic expansion is a common theme. Writers often create new spells or magical abilities that the characters can use. Then there's the theme of magical creatures. Fanfiction might introduce new creatures or give more detailed stories about the existing ones like the Hippogriffs or the Thestrals. And of course, the theme of love and romance, showing different pairings among the characters that may not be as explored in the original books.
One popular theme is exploring different relationships. For example, expanding on the friendship between Harry, Ron and Hermione in new and interesting ways. Another theme could be alternate timelines, like what if Voldemort had won the battle at Hogwarts? Also, there are fanfictions that focus on the backstories of minor characters, giving them more depth and significance in the wizarding world.
One of the main reasons is the love for the original series. People are so attached to the characters and the world of Harry Potter that they want more. Fanfiction provides an opportunity to continue the story in a way that suits individual tastes. It can also fill in the gaps or answer the 'what - if' questions that fans have. For instance, what if Sirius Black had survived? Fanfiction can explore these possibilities and keep the magic of Harry Potter alive.
One popular dark magician in fanfiction is Fenrir Greyback. He's a werewolf and his savage nature can be used in really interesting ways in stories. Writers might make him more of a main antagonist or give him a more complex personality. Then there's Antonin Dolohov. He was a Death Eater and in fanfiction, he could be given a new motivation or a different role in the dark magic world. And of course, there's always the potential for new, original dark magician characters created by the fanfiction writers themselves, who can bring fresh and unique storylines to the Harry Potter universe.
Popular Harry Potter fanfic often has strong character development. For example, they might expand on the backstories of minor characters like Neville Longbottom. Also, they usually create new and exciting plot twists. A fanfic might introduce a new prophecy related to Harry Potter that changes the whole dynamic.
One popular theme is the 'what - if' scenarios. For example, what if Harry had been sorted into Slytherin instead of Gryffindor? Another common theme is romance, like Harry and Hermione getting together instead of Ron and Hermione. There are also a lot of fanfictions that explore the backstories of minor characters in more detail.
The theme of time - travel is quite common in 'Harry Potter' fanfiction. Writers might send characters back in time to change certain events, or they use time - travel as a way to understand the past better. Also, the idea of magical inheritance is popular. Fanfictions might explore how a character discovers a long - lost family magic or a special power that was passed down through generations.
Some popular themes include alternate universes where the characters have different roles or relationships. For example, a story where Harry is sorted into Slytherin instead of Gryffindor. Another theme is exploring the backstories of minor characters in more detail, like Neville Longbottom's family history. Friendship development among the main characters is also a common theme, showing how their relationships grow and change over time at Hogwarts.
One popular theme is 'What if' scenarios. For example, what if Harry had been sorted into Slytherin? Another is exploring the backstories of minor characters like Neville's parents. And relationships are also a big theme, such as the friendship between the trio in more depth or romantic relationships that might have been hinted at but not fully explored in the original books.
Popular themes include the origin stories of some of the magical items or places in the Harry Potter universe. For instance, how the Marauder's Map was actually created. Another theme is the inclusion of different cultures in the wizarding world. And of course, there are the darker themes where new dark wizards emerge and the characters have to face new threats, often with a new group of heroes coming to the fore.
Character backstories are a big theme. Many fanfictions delve deeper into the past of characters like Severus Snape. We get to see his life before Hogwarts, his family situation, and how it all shaped him into the complex character we know in the original series. Also, the exploration of different Hogwarts houses and their unique cultures is quite popular.
One popular theme is alternate universes. Writers create different versions of the wizarding world, like a world where Voldemort won. Another theme is relationships, exploring different romantic pairings for the characters. And there are also those that focus on the backstories of minor characters.