For the 'Murder House' season, an OC could be a real - estate agent who unknowingly gets involved with the haunted house. They start experiencing strange things and gradually discover the dark secrets of the house. Their character arc could be about how they deal with this newfound horror and whether they try to expose the truth or run away from it.
One idea could be creating an OC (Original Character) who is a new patient at the asylum in 'American Horror Story: Asylum'. This OC could have a unique backstory, like being a psychic who was wrongly committed. They could interact with the existing characters, such as Sister Jude, and their psychic abilities could either help or hinder them in the asylum's crazy environment.
One idea could be to cross Kit with a character from another AHS season. For example, Kit meeting the witches from Coven. He could bring his own brand of mystery and charm to the witchy world. Maybe he gets caught up in their power struggles.
A cool 'ahs coven crossover fanfiction' idea could be a crossover with a fairytale world. The coven witches could find themselves in a land of fairytales. They might meet characters like Snow White or Cinderella. The witches' powers would be very different from the magic in the fairytale world, and this contrast could lead to some exciting adventures. Maybe they have to help a fairytale character break a curse using their unique witchcraft.
A possible fanfiction could involve Edward Mordrake in a different time period. For example, what if he was transported to the modern day? How would he interact with the new world? There could also be a story where he forms an unlikely alliance with another AHS character to fight a common evil.
One idea could be creating an OC who has a unique power related to time manipulation. They could be from a different dimension and end up in the Avengers' world. Another idea is an OC who is a master of ancient magic and teams up with Doctor Strange within the Avengers group. Maybe an OC that is a super - intelligent android created by a villain but has a change of heart and joins the Avengers.
You could create an OC for your Persona OC fanfiction who is an artist. This artist OC could use their art as a way to understand and even manipulate the Metaverse. For example, they might draw scenes from the Metaverse that give clues about upcoming events or hidden locations. Their art could also be a form of therapy for other characters who are struggling with their dual lives in the real world and the Metaverse.
Perhaps an OC who is a half - human, half - beast creature. This OC could struggle with acceptance in both the human and beast - kin societies. They end up meeting the main characters during their adventures and learn to embrace their unique identity with the help of the group, while also adding their own combat skills, which are a blend of human strategy and beast - like strength, to the team.
One idea could be to explore the Riddler's origin story from the perspective of your original character (OC). Maybe your OC is a detective trying to solve the mystery of the Riddler's first crime spree. Another idea is to have your OC be a sidekick of the Riddler, either willingly or by being forced into it. They could then have a complex relationship where the OC tries to influence the Riddler's actions for better or worse.
One idea could be an OC who is a brilliant scientist in the Fallout world. They could be working on a secret project to reverse the effects of radiation. Another idea is an OC who is a wandering trader, having all kinds of adventures while traveling from one settlement to another, facing raiders and mutants along the way. And a third idea could be an OC that is part of a new faction trying to bring peace and order to the wasteland.
You could also create an OC human who discovers a hidden talent for communicating with trolls through music. In the fanfiction, this character could use their musical ability to bridge the gap between the two worlds, maybe even creating a new form of harmony between trolls and humans that was previously unthinkable.
One idea could be to create a story where your Bratz OC is a new student in Stilesville. She has a unique fashion sense that both confuses and intrigues the other Bratz girls at first. As the story progresses, they become friends and she helps them design a whole new line of clothing for an upcoming fashion show.