Bran would be a great character to pair with Osha in fanfiction. Their relationship in the original story was interesting, and in fanfiction, it could be developed further. For example, they could go on a journey together to discover more about the ancient magic beyond the Wall.
Eddard Stark could be a great character to pair with Rickard Stark. As his son, their relationship can be explored in depth, like father - son training sessions or discussions about the future of the North.
Sansa Stark could be an interesting pairing. It could be a story of two strong - willed women from opposing sides. They could either become bitter enemies or, in a more creative take, find common ground and form an unexpected alliance. Also, Margaery Tyrell is a great character to pair with Cersei. Their power struggle in the show was fascinating, and fanfiction could take it in new directions, like Margaery actually befriending Cersei and showing her a different way to rule.
Theon could be a great character to pair with Yara. Their complex relationship as siblings could be explored further. Maybe in the fanfiction, they work together to redeem the Ironborn's reputation after all the chaos caused by Euron.
Samwell Tarly could be a great character to pair with Randyll. Their father - son relationship is complex and full of conflict. A fanfiction could explore how they might reconcile or further their differences in an alternate scenario.
Sansa Stark is a great choice. Their relationship in the original series was complex, and in fanfiction, it can be further explored in different ways, like a more positive or equal partnership.
Daenerys is an obvious choice. Their relationship in the original series was complex and passionate, and in fanfiction, there are so many ways to explore it further. Another good character could be Ser Jorah Mormont. His loyalty to Daenerys and his knowledge of Westeros could create interesting dynamics with Khal Drogo. And perhaps the witch Mirri Maz Duur could also be paired with him in a fanfiction that delves into the more magical and vengeful aspects of the story, exploring what could have happened if their interactions had taken a different turn.
In fanfiction, Lysa Arryn could be paired with Varys. Varys is known for his web of spies and political maneuvering. A story with them together could involve Varys trying to use Lysa for his own political ends in the Vale or Lysa trying to outwit Varys. Another great pairing could be with Brienne of Tarth. Brienne's sense of honor and Lysa's more self - serving nature could create an interesting dynamic. They could be in a situation where Brienne has to protect Lysa or Lysa has to decide whether to trust Brienne. And of course, Tyrion Lannister could be paired with her. Given Tyrion's intelligence and Lysa's paranoia, a fanfiction exploring their encounters and how they interact could be full of drama and unexpected twists.
Arya Stark could also be a good pairing. They could team up and take revenge on those who wronged their family. Arya's skills and Rickon's new - found strength could make them a formidable duo in the fanfiction world.
One interesting Osha fanfiction could be about her adventures beyond the Wall before she entered the story in the show. Maybe she had encounters with other wildling tribes and formed alliances. Another could be a story where she teaches Bran more about the ways of the wildlings and their survival skills.
Arya Stark and a young Viking warrior would be an interesting pair. Arya has her skills in stealth and combat, and the Viking warrior could have his own set of skills and values. They could learn from each other and go on adventures together.