One common theme is survival. Given the harsh world they live in, both Sansa and the Bastard's Girls often have to fight to stay alive. Another theme could be loyalty, as they might show loyalty to each other in different situations.
A theme that frequently appears is the idea of female empowerment. Sansa has grown from a naive girl to a strong woman, and the Bastard's Girls also have their own strength. Fanfics might explore how they use their power and influence in the world of Westeros.
Some 'Bastard's Girls and Sansa Fanfic' could be about their shared experiences in a post - war Westeros. They might work together to rebuild the kingdom or deal with the political aftermath. Sansa's diplomatic skills combined with the Bastard's Girls' combat and survival abilities would make for an interesting story.
One common theme is Sansa's growth. Many fanfics focus on how she matures from a young, sheltered girl into a powerful and independent woman. Another theme is her relationships, like her complex relationship with the other Stark siblings or her interactions with her enemies.
One common theme is family reunion. Given their separation in the original story, many fanfics explore how they come back together and the emotions involved. Another is the rebuilding of Winterfell. They are both Starks and Winterfell is their home, so it's a central aspect in their relationship in fanfics.
One common theme is redemption. Sandor, often seen as a rough and broken character, is on a path of redemption and Sansa can be a catalyst for that. Another theme is the power of unexpected relationships. They come from different worlds in the story, but in fanfic, they often find a connection that defies expectations.
Well, a frequent theme is growth. Both Arya and Sansa have complex characters, and fanfics usually show how they grow and change over time. For example, Arya might become more diplomatic while Sansa could learn some of Arya's survival skills. Also, the theme of redemption can be found in some fanfics. If they had any past mistakes or misunderstandings, they work towards redeeming themselves in the eyes of each other and their people.
One common theme could be identity. Since he's a bastard, exploring how he deals with his status in the story world might be a theme.
One common theme is the idea of new beginnings. Sansa's pregnancy can symbolize a fresh start for her character, both personally and politically. Another theme could be protection, as other characters may rally around her to protect her during her pregnancy.
One common theme is redemption. As I said before, Joffrey is often given a chance at redemption in these fanfics in relation to Sansa. Another theme could be forbidden love, considering their positions and the history between their families. Also, there might be a theme of miscommunication, where their true feelings for each other are hidden due to various reasons in the fan - created storylines.
One common theme is the idea of redemption. Tyrion, often seen as an outcast, and Sansa, who has endured so much, find a form of redemption in their relationship. They heal each other's emotional wounds.
One common theme could be redemption. Writers might try to redeem Joffrey's character so that he becomes worthy of Sansa's love. Another theme could be the power of love to change someone. Since Joffrey was so cruel in the original, fanfic could explore how Sansa's love could transform him. Also, there might be themes related to forbidden love as their relationship was not a positive one in the original context.