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.
She might become more confident in her earlier years. In the original story, Arya faced many hardships that made her grow in a certain way. But if she goes back in time, having the knowledge of future events, she could be bolder in her actions and decisions from a young age. For example, she might be more assertive in dealing with Sansa when they were kids, and not let Sansa's girly ways get to her as much.
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.
She would become more confident earlier. Instead of being a naive girl in King's Landing, she'd use her time - travel knowledge to be assertive. For example, she'd not be easily manipulated by Cersei.
One idea could be that Sansa goes back in time and tries to prevent the Red Wedding. She could use her knowledge of the future to warn her family and change the course of that tragic event.
Time travel can make Sansa more confident. When she travels back, she has the knowledge of future events. So she can be more assertive. For example, she won't be as easily manipulated as she was before. She becomes a stronger character as she tries to change the fate of her family.
In 'dark Sansa Stark fanfiction', Sansa can be more assertive. Unlike in the original where she is often a victim of circumstance, here she takes charge. For instance, she might not wait for others to rescue her but actively plot her own escape and revenge.
Another way their relationship might develop is through a series of events that expose their true selves to each other. Sansa's kindness and hidden strength could be revealed to Oberyn during a difficult situation, like when she stands up to a cruel lord. Oberyn's sense of honor and his softer side, which he usually hides, could also be shown to Sansa. This mutual discovery would strengthen their bond and lead to a more complex relationship in the fanfiction.
Well, it ended with her finding a certain kind of stability and ruling over the North.
Sansa Stark is a complex character in Game of Thrones fanfiction. She starts as a naive girl dreaming of a fairytale life. In fanfiction, she often evolves into a strong, politically astute woman. Writers explore her growth from a victim of circumstance to a shaper of her own destiny. For example, some fanfics might focus on how she uses her knowledge of the courts to outwit her enemies and gain power in the chaotic world of Westeros.
At first, Sansa might be a bit intimidated by Harry's status as a hero in the wizarding world. But she would quickly regain her composure and start to assert herself. Harry would respect her for that. They could interact in a way that combines their different skills. For instance, when facing a problem in the wizarding world that has elements of political intrigue, Sansa could step in and offer her insights, while Harry uses his magic to deal with the more dangerous magical aspects. Their conversations would be a blend of Sansa's refined language from Westeros and Harry's more modern wizarding world speech.