One idea could be a god OC who is a misfit among the other deities. Maybe this god OC has powers that are considered strange or unorthodox in the divine realm. For example, a god OC with the power to manipulate time in very specific, non - traditional ways.
A god OC that is a hybrid of different divine aspects can also make for a great fanfiction. For instance, a god OC that is part love deity and part war god. This duality would create internal conflict within the character and lead to complex relationships with other characters in the fanfiction.
One idea could be an OC God who has the power to manipulate time. This God could be a new threat to the Justice League as they struggle to understand and combat this power. For example, the God could reverse important events in the League's history, causing chaos.
An interesting concept for a Percy Jackson God OC fanfiction could be an OC who was created by the gods as an experiment. This OC would have powers that are a combination of different gods' powers, but they are also an outcast among both gods and demigods because of their origin. They might struggle to find their place in the world and go on a journey to discover who they really are and what their purpose is. Along the way, they could form unlikely alliances with both demigods and minor gods who also feel like outsiders.
One idea could be an oc who is an old god's descendant and tries to join the Justice League. They might have unique powers that both amaze and worry the League members.
Well, an interesting plot for a God OC in Game of Thrones fanfiction could be that the God OC is the true heir to the Iron Throne. This God OC has been hidden away for centuries and now returns to claim what is rightfully theirs. They have powers that no one has ever seen before, like the ability to transform into any creature. This could lead to some really cool battle scenes where the God OC takes on the form of a dragon to fight against the other claimants to the throne. They could also use their powers to unite the different kingdoms under their rule, but not without facing a lot of resistance from the power - hungry lords and ladies of Westeros.
A plot could revolve around an OC Dragon God who forms an unlikely alliance with Issei. They could team up to face a greater threat that neither the devils nor the angels are fully aware of. The OC could bring in their unique dragon god powers and knowledge to help Issei level up in a different way, adding a new dynamic to the story.
Well, an interesting plot might involve an OC Dragon God who has lost their memories and has to rediscover their powers and identity while interacting with the characters in Highschool DxD. They could start off as a seemingly ordinary student, but as the story progresses, strange things start to happen that hint at their true nature. Also, an OC Dragon God could come from a different dimension and bring with them unique powers and knowledge that change the dynamics of the Highschool DxD world. Maybe they have a special connection to one of the main characters that has been fated since long ago.
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.