The plot could center around the cultural clash between the two families. The Lannisters are known for their cunning and wealth, while the Starks are more about honor and loyalty. So, when a Lannister marries Ned Stark, there would be a lot of adjustments. The Lannister in the marriage might try to bring in their lavish lifestyle, which could be resisted by Ned Stark at first. But over time, they could learn from each other. The Lannister could become more honorable, and Ned Stark could understand the importance of some political maneuvering.
Perhaps the plot could involve the two coming together to fight a common enemy. The Targaryen might bring her dragons (assuming this is in a universe where dragons exist in this fanfiction) and Ned Stark could bring his military might and the loyalty of the North. Their marriage could be a strategic alliance that was initially arranged for political reasons but then they grow to love each other. They would then have to navigate the power struggles in Westeros, with many houses vying for control.
Their relationship might start off very rocky. Given the history between their families, there would be a lot of mistrust. But as they spend more time together, they could start to see each other's good qualities. For instance, Ned Stark might notice the Lannister's intelligence, and the Lannister could come to admire Ned's integrity.
One potential plot twist could be that the marriage is a political move to end a long - standing feud between the two houses. However, there are secret alliances within each house that oppose the union, leading to internal power struggles. For example, some Lannisters might be against sharing power with the Starks, and vice versa.
Well, Ned Stark is a given. For the Targaryen side, it could be a Targaryen who has lived in Essos and has different views from the main Targaryen line we know in the books/show. This character could be more open to the ways of the North. Or it could be a young Targaryen heir who Ned Stark marries to strengthen an alliance between the North and any remaining Targaryen supporters. This character might be inexperienced in the ways of Westeros politics and Ned would have to guide her.
One common theme is the idea of enemies - to - lovers. Given their opposing positions in the original story, it's interesting to see how fanfic writers transform their relationship. Another theme could be political intrigue. Since both are involved in the power games of Westeros, fanfictions often explore how their relationship affects the political landscape.
The challenges would be many. Politically, their marriage would be a strange alliance. The Starks and Lannisters have different agendas. Ned would want to rule justly and fairly, while Cersei is only interested in power for herself and her family. Emotionally, they are polar opposites. Ned is a loving father and a man of principle. Cersei is a complex character, often driven by jealousy and greed. Her relationship with Jaime is a major hurdle. And Ned would have a hard time trusting Cersei, given her reputation for underhandedness. Their marriage would be like mixing oil and water in the world of fanfiction.
Yes, there are some interesting ones. You can start by looking on fanfiction platforms like Archive of Our Own. Some stories might explore an alternate universe where their relationship develops in unexpected ways, perhaps due to political alliances or personal revelations that force them to interact more closely than in the original series.
A plot could involve a time - travel scenario. Ned Stark somehow travels to a time when Cersei was younger and more vulnerable. Instead of seeing her as the enemy, he tries to guide her in a different path, which could lead to a completely different political landscape in Westeros. This would involve a lot of character development for Cersei as she grapples with this new perspective from Ned.
Well, perhaps Harry Potter uses his magic skills like the Patronus charm to fend off the enemies who are about to harm Ned Stark. He could apparate Ned to a safe place just in time.
The plot might focus on cultural clashes. The Lannisters and the Starks have different values and ways of life. In this fanfiction, it could show how the Stark oc (original character) tries to adapt to the Lannister way of life in Casterly Rock or how Tywin has to deal with the more 'northern' Stark traditions that his new wife adheres to. For example, the Stark oc might be more in tune with nature and the old gods, which could be a contrast to the Lannister's more materialistic and power - hungry ways.