One idea could be creating a male oc who is a skilled healer from a far - off land. He arrives in Westeros during a time of great plague and uses his unique knowledge to try and save lives, which gets him involved in the political intrigues of the court. Another could be a male oc who is a master swordsman, self - exiled from his own house due to a family feud, and he ends up joining the fight for the Iron Throne on the side he believes in. A third idea is a male oc who is a scholar, researching the ancient prophecies of Westeros and trying to influence the events based on what he discovers.
You could make an OC who is a dragon rider from a hidden dragon - riding clan. They enter the story during a time of great conflict, and their bond with their dragon is different from what is seen in the show. Their arrival could change the balance of power and the way people view dragons in the world of House of the Dragon.
One idea could be an OC who is a brilliant but unorthodox medical student. They constantly clash with House in their diagnostic methods yet prove to be surprisingly accurate at times. For example, they might use a new technology or approach that House is initially skeptical about but later comes to respect.
Perhaps the dragon OC has the ability to transform into a human - like form. It infiltrates the company of dwarves and hobbits, initially with some ulterior motive. But as the journey progresses, it starts to care for them and uses its dragon powers secretly to aid them against various perils, creating a lot of mystery and suspense in the fanfiction.
Perhaps an OC that is a powerful wizard in the Dragon Ball universe. This wizard OC discovers a dark magic that is threatening to consume the universe. They must then seek the help of the Z - fighters, who are initially skeptical of magic. The OC has to convince them of the danger and together they find a way to stop the dark magic. Along the way, the OC teaches the Z - fighters about the power and responsibility of magic.
Maybe an OC who is a rogue with a mysterious past. They have a personal vendetta against a powerful Templar who has gone rogue and joined the enemy. The Inquisition becomes their means to get close to this Templar and exact revenge. Their skills in stealth and thievery could help the Inquisition in various covert operations.
Maybe the OC White Dragon Emperor gets involved in a multi - realm tournament. He has to battle against various powerful beings from different dimensions. This would not only show his combat skills but also how he strategizes against different types of opponents.
One idea could be creating an OC who is a hybrid of two different magical creatures in the Owl House universe. This could lead to unique storylines about acceptance and self - discovery.
One plot idea could be the OC dragon having a unique bond with Yona. Maybe it's a dragon that was thought to be lost or forgotten, and it has special powers that help Yona in her journey, like the ability to sense danger from afar.
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.
An interesting plot could be that the OC is the last of the Frieza race after a great catastrophe. They are on a mission to rebuild their race but in a more benevolent way. However, other races are suspicious of their intentions, and they have to prove themselves worthy of trust.