In the show, their relationship was mostly one of power and manipulation. But in fanfiction, it could be more of a mentorship. Tywin might see Sansa as a protégé, teaching her how to manage estates and deal with political rivals. Sansa, in turn, could use this knowledge to her advantage later. For example, she could learn how to outwit Littlefinger with the skills Tywin taught her.
In fanfiction, perhaps Sansa could end up as Tywin's spy. He realizes her potential to gather information due to her connections and her ability to blend in at court. Their relationship would then be based on mutual benefit. Sansa would get protection and a certain amount of power within the Lannister regime, while Tywin would have an inside source. This would create a complex and secretive relationship that was not explored in the show.
Often, Tywin is in a position of power over Sansa. So, he may interact with her in a condescending or manipulative way. For instance, he might use his authority to force her into certain decisions.
Their relationship could develop in a very complex way. At first, Arya would be full of rage towards Tywin. However, if she were to be captured by the Lannisters and Tywin were to show her a different side of himself, perhaps a more paternal side (even if it's just a ploy), Arya might start to question her hatred. On the other hand, Tywin might see Arya as a potential asset, someone he could mold in his own image. This could lead to a relationship that is part mentor - mentee and part captor - captive, with a lot of power dynamics and emotional turmoil.
Well, in some fanfictions, Sansa might learn from Tywin about power and leadership. Since Tywin is a master of political intrigue, Sansa could start to pick up on his strategies. For example, she could use his teachings to gain more influence in the court, while also trying to keep her Stark identity intact. This would create an interesting dynamic between them as she tries to navigate the dangerous world of the Lannisters.
At first, it could be very tense. Tywin is used to being in control and having things his way, and the Stark oc would likely have her own ideas and values. So, they might start off butting heads. But as time goes on, they could start to understand each other better. The Stark oc might see that Tywin has his reasons for his actions, and Tywin could come to respect the Stark oc's strength and integrity.
Sansa would be more assertive in her political moves. She has seen the consequences of inaction and bad decisions in the future. So, she would be quicker to make decisions that benefit her family and herself. For example, she might be more involved in military strategies to protect the North.
One plot idea could be that Tywin, seeing Sansa's value as a political pawn, decides to use her in a different way than originally planned. Instead of marrying her off to Tyrion, he takes her under his wing to teach her the ways of politics in Westeros. This could lead to an unlikely bond between them as Sansa tries to navigate the dangerous world of the Lannisters while still holding onto her Stark identity.
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 possible aspect of Tywin Lannister and Sansa fanfiction could be the power dynamics at play. Tywin is a shrewd and powerful man, while Sansa is young and has been through much. In fanfiction, their interactions might range from Tywin seeing Sansa as a political pawn, which could lead to a complex relationship where Sansa has to navigate his machinations. Maybe she tries to use her charm and wits to gain some advantage in the cut - throat world of Westeros politics. It could also explore how Sansa's experiences with the Lannisters in general shape her relationship with Tywin. For example, her hatred for Joffrey and Cersei might initially make her very wary of Tywin, but over time, she could come to see him in a different light as she realizes he has different motives and methods compared to his more volatile children.
At first, their interaction would likely be very guarded. Sansa would be cautious as she has learned to be in a world full of danger. Tywin would probably see her as a young, naive girl but also a valuable asset. As time goes on, Sansa might start to challenge Tywin's ideas, which could lead to some intense exchanges between them.
In OC fanfiction involving Tywin Lannister and the Starks, Tywin's strategic mind is a central aspect of his portrayal. He is always looking for ways to strengthen his house's position. The Starks, on the other hand, are known for their integrity. An OC could be a healer, for instance, who treats the wounded from both sides during a battle. This OC's presence might lead to some unexpected interactions between Tywin and the Starks, like Tywin seeing the Starks in a more sympathetic light due to the OC's influence.