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.
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.
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.
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.
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 Tywin Lannister x Sansa fanfiction, a frequently seen theme is the transformation of Sansa. Under Tywin's influence, she could be transformed from a naive girl into a more politically astute woman. Also, the theme of loyalty is important. Sansa's loyalty to her family and her house is put to the test when dealing with Tywin. Will she stay true to her Stark roots or be swayed by Tywin's offers? Additionally, the theme of revenge can come into play. Sansa may seek revenge against the Lannisters for what they've done to her family, and her relationship with Tywin can be a part of that revenge plot, either by using him or by directly opposing him.
A plotline might involve Sansa trying to protect her unborn child from the dangerous political games in Westeros. With Tywin as the father, the child would be in the middle of many power plays. Also, there could be a plot where Sansa uses the pregnancy to try and change the Lannisters' attitude towards her and her family. Maybe she hopes to bring some peace between the Starks and the Lannisters through the child. It could also explore how Tywin would react to having a child with Sansa, considering their different backgrounds and ages.
I'm not sure if there are many good ones specifically about Sansa and Tywin Lannister with a pregnancy theme in fanfiction. Fanfiction can be a very niche area and often depends on personal taste. You might want to search on some well - known fanfiction websites like Archive of Our Own and filter through the results to see if there are any that catch your eye.
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.
Often, there's a plotline where the OC is a servant or a low - born character who rises to prominence and has to deal with the politics of Tywin Lannister and the Starks. They might be caught in a web of lies and intrigue as they try to serve both sides without getting killed. Also, a plotline could involve an OC as a mage or a seer who foresees the destruction that the feud between the two houses will bring and tries to stop it.