For a Blue Exorcist OC fanfic, you could have a plot where your OC is an outcast among the exorcists because of their unique heritage. They are half - demon, half - human, and most of the other exorcists don't trust them. But when a major demon threat emerges that only their unique abilities can combat, they have to prove their worth. Along the way, they could form an unlikely alliance with a group of misfit exorcists and together they learn to accept each other's differences and work towards defeating the demon. This plot would explore themes of acceptance, identity, and redemption.
One plot idea could be that your OC discovers a hidden power within themselves that is connected to an ancient prophecy. They then have to figure out how to control this power while also dealing with the other exorcists who are either suspicious or jealous of them. Another idea is that a powerful demon has a special interest in your OC and is constantly trying to either turn them to the dark side or use them for some evil purpose. Your OC has to resist and find a way to defeat this demon.
A great plot idea for a Blue Exorcist OC fanfic could be centered around a new type of demon that the exorcist world has never seen before. Your OC is the first to encounter it and realizes that it has a strange connection to their past. As they investigate, they find out that there is a conspiracy within the exorcist organization itself. Some members are secretly trying to use this new demon for their own gain. Your OC has to expose the conspiracy and stop the new demon from causing chaos. They might also make some new friends and enemies along the way as they try to save the day.
Well, for Blue Exorcist OC fanfiction, you could have a plot where your OC is a hybrid of a human and a demon. This causes a lot of internal conflict as they struggle with their identity and are feared by both sides. They try to find a place where they can belong. Another plot idea is that your OC is a master of a new form of exorcism that is not recognized by the True Cross Order. They have to fight to get their method accepted while also using it to combat a new wave of powerful demons. And then there's the idea of your OC getting caught in the middle of a power struggle between different factions within the exorcist world, having to choose a side while trying to stay true to their own beliefs.
One idea could be an OC tamer who has the ability to communicate with rare and powerful demons. For example, they might be able to understand the language of ancient demons that others can't. This would give them an edge in battles and in understanding the demon world better.
One plot idea could be that the cat OC is a reincarnation of an ancient exorcist. It slowly starts to remember its past life as it encounters different demons and exorcists. This could lead to a journey of self - discovery and also help the main characters in their fight against stronger demons. Another idea is that the cat OC has a special bond with a powerful demon, but it has to keep this a secret from the exorcists. This creates a lot of internal conflict and also the potential for some tense moments when the secret is almost revealed.
One idea could be that the OC was a powerful exorcist in their past life. In this reincarnation, they start off not knowing their true potential. As the story progresses, they begin to have strange dreams and visions that are actually memories from their past life. They then meet a character from their past life who helps them unlock their powers and they join the fight against demons.
One idea could be that the main character is reincarnated as a powerful exorcist from a different era and has to adapt to the old ways of exorcising demons while still using their modern knowledge. Another could be a reincarnation where the character comes back as a demon with the memories of their past life as an exorcist, leading to an internal struggle.
One plot idea could be that the male OC is a new student at True Cross Academy. He's a bit of an outcast because of his mysterious past. As he tries to fit in, he discovers a hidden plot within the academy that involves demons. Another idea is that he has a special power that the exorcist order wants to use for their own purposes, but he has to decide whether to cooperate or not. A third plot could be that he is on a quest to find a lost artifact that has the power to either destroy all demons or give them ultimate power, and he has to face many challenges along the way.
One popular plot idea is a crossover where the characters from Big Hero 6 end up in the world of Blue Exorcist. For example, Hiro and Baymax could be exploring the True Cross Academy and getting involved in the exorcist battles there. Another idea is that the technology from Big Hero 6 is used to fight the demons in the Blue Exorcist universe.
One idea could be exploring the backstory of a minor character in the Blue Exorcist world. For example, you could write about the life of a lower - level demon that Rin and the others encounter. Another idea is a time - travel fanfiction where a character goes back to a crucial moment in the Blue Exorcist timeline and changes something, leading to a whole new set of events. Maybe a character gets sent to an alternate dimension where the rules of exorcism are different.
One plot idea could be that Naruto, with his immortality, somehow gets transported to the world of Blue Exorcist. He teams up with Rin and the others to fight a new kind of demon that is threatening both their worlds. His ninja skills combined with the exorcist powers would make for an exciting adventure.
A unique plot idea could be that Rin's tail has a mind of its own and can communicate with other demonic entities. This would lead to some really interesting situations where Rin has to deal with the advice or demands of his tail.