One idea could be an OC who is a slave in the wizarding world but discovers they have a unique magical ability that could change their status. For example, they might be able to communicate with magical creatures in a way no one else can, and this ability catches the attention of Harry Potter and his friends. They then help the OC fight against the unjust system of slavery in the wizarding world.
Perhaps the OC slave is in a situation where they are forced to work for a powerful dark wizard. However, they have a kind heart and secretly helps Harry Potter and his friends by passing on information. As the story progresses, the OC's loyalty is tested as they face threats from the dark wizard they serve. Harry Potter and his friends then try to rescue the OC from their enslavement while also using the OC's knowledge to their advantage in the ongoing battle against evil in the wizarding world.
A really interesting plot could be that the reborn character is actually a huge Harry Potter fan in their previous life, so they know all the secrets and prophecies. They use this knowledge to their advantage. For instance, they might be able to figure out how to defeat Voldemort more quickly by using a combination of things they remember from the books and their own new ideas. They could also change the relationships between characters. Instead of Harry and Hermione just being friends, the reborn character could nudge them towards a romantic relationship earlier on, which would then have a ripple effect on the whole story.
Well, an interesting plot for a Harry Potter oc fanfic could be an OC who discovers a hidden chamber in Hogwarts that has been sealed off for centuries. This chamber could hold the key to a powerful magic that could change the balance between good and evil in the wizarding world. Or perhaps an OC who has the power to see the future in their dreams but doesn't understand it at first, and they keep having these strange dreams that seem to be related to Voldemort's return. They then have to figure out what it all means and how to use this power to help their friends.
One idea could be that the OC Lestrange is a distant relative who has been kept in the dark about the family's dark deeds. They could start at Hogwarts and gradually discover the truth, leading to an internal struggle between loyalty to family and doing what's right. For example, they might find out about the Horcruxes and have to decide whether to help Voldemort or oppose him.
The OC could be an exchange student from a far - off wizarding school known for its dragon - taming curriculum. At Hogwarts, they find that the dragons here are different in nature. They start a project to cross - train the Hogwarts dragons with the techniques from their home school. This causes a stir among the students, especially those in Care of Magical Creatures class, and also catches the attention of some of the more devious characters in the wizarding world who want to use the OC's knowledge for their own evil purposes.
One idea could be that the OC is a powerful mage from a far - off land who comes to Arendelle during a time of new danger. The OC meets Elsa and they initially have a bit of a clash due to their different ways of using magic. But as they face the new threat together, they start to understand and respect each other more. Eventually, they combine their magical powers to save Arendelle and in the process, form a deep friendship or even more.
A really interesting plot for a fanfic where Hermione is Harry's sister could involve the two of them having a shared magical inheritance from their parents that they need to figure out. This could lead to adventures where they explore old family magic. It could also change the dynamic of their relationships with Ron and other friends. Hermione might be more protective of Harry in this scenario, and they could have inside jokes and a deeper understanding of each other based on their family bond.
A mystery - themed 'the oc fanfic' would also be great. Maybe there's a mystery surrounding the Cohen family's wealth or a long - lost relative that suddenly shows up with a hidden agenda. The characters would have to work together to solve the mystery, and in the process, their relationships would be tested and new alliances formed.
One idea could be exploring an OC's (Original Character) journey to become a leader within the 100's post - apocalyptic world. They could start as an outcast and through their unique skills, like advanced medical knowledge or exceptional hunting abilities, gain the respect of different factions.
Well, you could have a fanfic where Voldemort uses DND - style dark magic to open portals to other dimensions. The Order of the Phoenix has to quickly learn DND - style combat and magic rules to fight off the new threats that come through these portals. Harry could be sent on a special mission to find a DND - style mage who can teach them the counter - spells. Meanwhile, the Death Eaters are also trying to master this new form of magic for their own evil purposes. This would create a really exciting and unique story.
Perhaps a plot where the protagonist can choose to either side with the Ministry of Magic during a time of political unrest within the wizarding world or join a rebel group. This would involve different magical battles and moral dilemmas depending on the choice. In the 'harry potter cyoa fanfic', this could show different aspects of the wizarding society that we don't often see in the original books.