An OC could be a Muggle - born with a very special family heirloom that turns out to have magical properties once they arrive at Hogwarts. This heirloom could be the key to solving an ancient mystery within the castle walls, like a hidden chamber or a long - forgotten spell.
Perhaps an OC who is a werewolf but has managed to keep it a secret until they come to Hogwarts. Their struggle to fit in while hiding this big part of themselves and then eventually having to reveal it during a dangerous situation, like a full - moon night when a dark wizard is on the loose, would make for an exciting story.
One idea could be a story where the main character discovers a hidden chamber in Hogwarts that has been lost for centuries. It could be filled with ancient magic and dangerous creatures. Another plot could involve a time - traveling adventure, where the character goes back in time to witness a significant event in Hogwarts' history. Maybe they have to stop a dark wizard from changing the past. A third idea is a story centered around a mysterious new student who has a special power that no one understands, and the main character has to figure out if they are a friend or a foe.
One idea could be Naruto being a transfer student to Hogwarts. He might use his ninja skills in the wizarding world, like using his speed to be great at Quidditch. Another could be that Naruto discovers he has magical powers in addition to his chakra, and he has to learn to balance both. And perhaps he makes friends with Harry Potter and they teach each other their unique skills.
One idea could be exploring a character's backstory that wasn't fully covered in the game. For example, delving deeper into the family history of a side character. Maybe they have a hidden connection to one of the main wizarding families. Another plot could involve a new mystery within Hogwarts, like a secret chamber that has been long forgotten but holds a powerful magical artifact. A third idea would be to create an alternate timeline where a major event in the game didn't happen, and see how it changes the relationships and the overall story at Hogwarts.
A plot could involve a group of Hogwarts students accidentally ending up at Ilvermorny and having to adapt to the new school's rules and culture while also trying to find their way back home. It would be a story of discovery and friendship as they interact with the Ilvermorny students.
One idea could be Draco being sorted into a different house by mistake. Maybe the Sorting Hat has a moment of confusion and puts him in Hufflepuff. This would lead to him having to adjust to the very different values and atmosphere of that house, and it could be a journey of self - discovery as he realizes there's more to life at Hogwarts than just the Slytherin way.
Well, perhaps in the fanfiction, Hermione transfers to Hogwarts because her family has to move for some Muggle - related reason. Once at Hogwarts, she could find that the Hogwarts library has some books that were banned at her old school. This could lead her on a quest to study those books and uncover secrets that not only help her in her studies but also in solving a mystery that has been plaguing Hogwarts for years.
Another plot could involve the Marauders getting involved in a mystery that is plaguing Hogwarts in the present day. They use their old - school pranking skills and knowledge of the castle's secrets to solve it. They might have to team up with some of the current Gryffindor students who remind them of themselves when they were young.
One plot idea could be that Draco is chained in the Hogwarts dungeons due to a false accusation. Harry, against his better judgment, decides to investigate and ends up finding out the real culprit while also learning more about Draco's complex personality. Another idea is that Draco is chained as part of a dark magic experiment gone wrong, and Hermione uses her vast knowledge to try and break the chains, leading to an unlikely alliance between them. A third plot could be that Draco chains himself as a form of self - punishment for his family's actions, and a new student at Hogwarts helps him come to terms with his past and break free from his self - imposed chains.
A possible plot could involve a Hogwarts teacher from the past crossing over to the present day Hogwarts in a fanfiction. This could lead to interesting clashes between old and new teaching methods. Or perhaps a crossover with a character from a fairy - tale world. The teacher could help the fairy - tale character understand the more complex magic of Hogwarts.
Well, perhaps in this fanfiction, Fred and Hermione could be paired up for a special assignment by a professor. They start off not getting along because of their different personalities, but as they work together, they realize they have more in common than they thought. For example, they both have a strong sense of loyalty, Fred to his family and Hermione to her friends. They could end up using their combined skills to save a part of Hogwarts from a magical threat.