Common themes in these fanfics include the corruption of innocence. Sansa starts as a somewhat innocent girl, and Littlefinger's influence is a form of corruption. Her journey to resist that corruption is a big part of the story. Another theme is the search for identity. Sansa is trying to find out who she really is in the midst of all the chaos and Littlefinger's manipulations. And finally, the theme of loyalty is there. Sansa has to decide where her loyalty lies, whether it's with Littlefinger for a time or with her own family and the North. Littlefinger, on the other hand, has no real loyalty except to his own power - hungry self.
The relationship between Sansa and Littlefinger in fanfic can be seen from multiple angles. Littlefinger is a master of manipulation. He thinks he can control Sansa easily. But Sansa is not as helpless as he believes. In some fanfics, their relationship is a battle of wits. Sansa is learning the ways of the game of thrones from Littlefinger, whether she likes it or not. And Littlefinger, while trying to use her, also has to deal with Sansa's growing independence and intelligence. This complex relationship can lead to various plot developments in fanfic, such as Sansa outsmarting Littlefinger in political intrigues or Littlefinger making a last - ditch effort to regain control over her.
Their relationship could also develop in a more complex way where Sansa starts to play Littlefinger at his own game. She may start to use his own tactics of manipulation against him, leading to a shift in the power dynamic between them. It could be like a cat - and - mouse game where Sansa is slowly turning the tables on Littlefinger.
One interesting plotline could be Sansa gradually seeing through Littlefinger's manipulations. She starts to notice the subtle ways he tries to control her and uses her new - found political acumen to outwit him. For example, she might pretend to still be under his thumb while secretly gathering allies against him.
In Game of Thrones Jon x Sansa fanfic, there are several common themes. Power dynamics is one of them. They both have different kinds of power - Jon with his military leadership and Sansa with her political skills. How they balance and combine these powers is often explored. Also, the theme of redemption. They both have made mistakes in the past and in fanfic, they can find redemption through their relationship with each other. And of course, the theme of love, not necessarily romantic love all the time, but a deep love for their family and home, which drives their actions.
One common theme is manipulation. Petyr is known for his manipulative ways, and fanfictions often focus on how he tries to manipulate Sansa. Another theme is Sansa's growth. She goes from being a young, somewhat naive girl to someone who can see through Petyr's schemes. Power is also a theme. Petyr's pursuit of power through Sansa and Sansa's own journey towards power in the face of Petyr's influence are often explored.
In these fanfictions, a prevalent theme is the idea of breaking free from the shackles of their past. Tyrion was always an outcast in his family, and Sansa had to endure so much abuse. Their relationship in fanfiction can symbolize their journey towards freedom. Also, the theme of love in an unexpected place is common. Their initial relationship was forced, but in fanfiction, it can transform into a genuine and loving bond.
One common theme is redemption. Often, the OC might be someone with a troubled past who finds redemption through their relationship with Sansa. For example, an OC who was once a criminal but turns good because of Sansa's influence.
One common theme is power struggle. Cersei is known for her thirst for power, and Sansa gradually becomes a player in the power game. Fanfiction often explores how they vie for influence. Another theme is femininity. They both represent different types of femininity in the series, and fanfiction may analyze or redefine this. Also, revenge is a theme. Sansa has reasons to seek revenge on Cersei, and this can be a major plot point in many fanfictions.
One interesting Sansa fanfic could be about her journey to become a more powerful leader in the North on her own terms. It might explore how she uses her wits and the lessons she's learned throughout the series.
Power dynamics is also a frequent theme. Since power is such a central part of the Game of Thrones world, it often plays into the GXG relationships. Maybe one character is a noble and the other a commoner, and they have to deal with the differences in their status while being in love. Another aspect could be two powerful women vying for power and finding love in the process.