Perhaps the OC first - born is a female character. In a male - dominated world like Westeros, she could break the norms. She might start by training as a knight in secret. As she grows older, she reveals her skills and uses them to protect her family from raiders. Her actions could then inspire other women in Westeros, leading to a movement for female empowerment within the context of the fanfiction.
One idea could be the first - born OC facing the political intrigue in King's Landing. They might have to navigate the power struggles between different houses, like trying to form alliances with the Starks or Lannisters while keeping their own family's interests in mind. Another plot could involve the OC being trained in combat and magic, perhaps by a mysterious figure from Essos, and then using those skills to protect their family during the wars that ravage Westeros.
Your OC could be a sellsword with a special ability to predict the outcome of battles like in a game. This attracts the attention of various lords who want to use this ability for their own gain. However, your OC has their own agenda. They want to use their skills to end the war and bring peace to Westeros. Along the way, they face challenges like betrayal from those they thought were friends and having to prove themselves in battles against powerful opponents. This plot would allow for a lot of action, drama, and character development within the Game of Thrones OC Gamer Fanfiction.
One idea could be an original character who is a bastard from a minor noble house in the North. They grow up with a unique skill, like being an expert tracker. They could get involved in the events related to the White Walkers early on, perhaps by accidentally stumbling upon one of their lairs. Their journey could then be about warning the other houses and trying to find a way to stop the threat before it reaches the major kingdoms.
One plot idea could be an OC who is pregnant and trying to hide it from powerful enemies in King's Landing. She has to navigate the dangerous political intrigue while protecting her unborn child.
One idea could be an OC who is pregnant and is trying to hide it from the warring factions in King's Landing. She might be a servant in the Red Keep and is afraid of what will happen if her pregnancy is discovered, as she doesn't know who the father is among the many lords and knights who frequent the castle.
One idea could be an OC Baratheon who is a long - lost cousin. This OC could come to King's Landing with a claim to the throne, causing political unrest among the existing Baratheon claimants. He or she might have unique skills, like being an expert in naval warfare, which was important for the Baratheons. Another plot could involve an OC Baratheon woman who disguises herself as a man to fight in the wars, and along the way, she discovers secrets about her family's past that could change the course of the Baratheon legacy in Westeros.
Perhaps the OC Dragonlord is a bastard of a Targaryen. They grow up in Essos, learning the ways of dragon - taming from an old sorcerer. When they hear of the chaos in Westeros, they decide to cross the Narrow Sea with their dragon, planning to claim a throne for themselves. Along the way, they form an unlikely alliance with a group of outcasts, who help them navigate the political intrigues of Westeros.
A plot idea could involve the Direwolf OC being an outcast among its own kind. It then forms an alliance with a group of outcasts in Westeros, like a band of thieves or a small, forgotten clan. They all work together to change their fates. Another interesting plot would be if the Direwolf has the ability to communicate with other animals. It uses this power to gather information for its human companion, and they use this knowledge to outwit their enemies in the game of thrones. You could also have a plot where the Direwolf OC is the last of its kind and it's on a mission to find a way to repopulate its species.
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.
An interesting 'oc game of thrones fanfiction' could focus on an OC who is a female knight in a world dominated by male warriors. She could face discrimination but also prove herself in tournaments and battles. Maybe she becomes a trusted ally of a major character like Jon Snow. Or you could have an OC who is a bard that spreads tales which either inspire or deceive the people of Westeros. Also, an OC who is a foreign diplomat trying to broker peace deals between the warring factions while having their own hidden agenda would be a great concept.
One idea could be exploring what would happen if a minor character like Gendry had been secretly trained in magic. He could use his newfound powers to unite the smallfolk against the warring nobles. Another plot could revolve around a female knight from the North who disguises herself as a man to fight in the wars, and along the way, she discovers secrets about the White Walkers that no one else knows. Or perhaps a fanfiction where Daenerys and Sansa form an alliance much earlier and together they reshape the power dynamics of Westeros.