The male OC Stark heir could be thrust into the role of leadership much earlier than expected due to unforeseen circumstances, like the sudden death of his father. He then has to deal with the challenges of ruling Winterfell, such as food shortages, disputes among the vassals, and the ever - present threat of the White Walkers. He uses his unique skills and the support of his loyal followers to overcome these obstacles and restore the Stark name to its former glory.
One idea for a male OC in the Stark family could be a long - lost cousin. He could have been sent away as a child for some reason, perhaps due to a political intrigue within the family. He might be a skilled swordsman, trained in secret by an old knight who knew his true identity. His personality could be a mix of the traditional Stark honor and a bit of a roguish charm, which he developed during his time away from the family. This would make him an interesting addition to the Stark family dynamics in a fanfiction.
One possibility could be that the oc, being the son of Drogo, has a claim to the Dothraki leadership. He could strive to unite the Dothraki clans in a different way than Daenerys did. Maybe he focuses on forging alliances with the other kingdoms based on mutual trade and protection rather than conquest.
Perhaps Harry is a Stark and the cave is a place of prophecy. He enters the cave and sees visions of the future of Westeros, including the downfall of his family if certain actions are not taken. He then uses his knowledge from his previous life (if we assume some sort of reincarnation or transfer from his Harry Potter world) and his Stark upbringing to change the course of events. He might form alliances with unlikely characters, train in new forms of combat or magic found in the cave, and ultimately strive to put a Stark on the Iron Throne, all while trying to keep his family alive and the realm in balance.
An interesting plot could be that the Stark family discovers a portal to the Naruto universe. Sansa Stark, being the politically astute character she is, tries to learn about the power structures in the ninja world. Meanwhile, Naruto and his friends are intrigued by the Starks' noble demeanor. They form an alliance to fight a common enemy that somehow threatens both their worlds, like a powerful dark force that has the ability to manipulate time and space.
The personality of a male Stark OC can be developed in multiple ways. First, look at the environment he grows up in. If he grows up in the cold North, he might be more stoic and resilient. His family's influence is crucial too. If his father was a strict disciplinarian, he could be very respectful and obedient, but also have a rebellious streak deep down. He could also be influenced by the magic and superstition in the Game of Thrones world. Maybe he has a connection to the old gods and is more spiritual than other Starks. This could affect his decision - making and how he views the world around him. For example, he might see signs from the gods in everyday events and base his actions on those interpretations.
It could be that Arya is tape - gagged during a mission gone wrong. She was infiltrating an enemy stronghold but was discovered. Now, she has to figure out how to free herself and complete her mission while being silenced. This would show her determination and survival skills even in a difficult situation.
One plot idea could be that the heir is a long - lost Targaryen who was raised in Essos. They come to Westeros with a new set of values and ideas, trying to unite the kingdoms not through force but through trade and cultural exchange. This heir could face resistance from the traditional lords who are used to the old ways of power struggle.
A female Stark OC could play the role of a peacemaker. For instance, if there are disputes between different Stark siblings or between the Starks and other houses. She could use her diplomatic skills, which she might have learned from observing her father. Her calming presence and ability to see different perspectives would help in resolving conflicts.
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 possible plot could be that Robb Stark manages to avoid the Red Wedding trap. Maybe he receives a tip - off from an unexpected source, like a disgruntled Frey servant. With this knowledge, he could turn the tables on his enemies. He might use his military strategy skills to ambush the Freys instead, and this could lead to a major shift in the power dynamics in the North, with Robb emerging as an even stronger leader.