In the fanfic, she might be used as a bargaining chip. The Boltons could try to trade her for some advantage, like territory or loyalty from other houses.
In a fanfic where Arya gets captured, she might be used as a bargaining chip. Her captors could try to exchange her for something valuable, like a strategic location or a large sum of gold. Maybe they want to use her to manipulate the Starks.
Well, a plot could be centered around a political intrigue where Ramsay believes Arya is a valuable pawn in his power - grabbing scheme. But Arya, being Arya, has her own agenda. She could start building her own network within Ramsay's territory, befriending the downtrodden and oppressed. Eventually, she could lead a rebellion from within, using the element of surprise and her knowledge of Ramsay's weaknesses.
She could use her skills as a Faceless Man. Arya might disguise herself as someone else and slip away unnoticed.
If Arya and Ramsay interacted, it would likely be a battle of wits. Arya is smart and resourceful, while Ramsay is cruel and cunning. Their interactions could lead to a lot of unexpected twists. For instance, Arya might be able to expose Ramsay's true nature to more people, which could change the political landscape in Westeros.
Another idea for a fanfic is that Arya discovers she's not really the last Stark. There could be a long - lost relative hidden away. She then embarks on a journey to find this person. Along the way, she has to overcome many obstacles and face new enemies, all while trying to keep the hope of the Stark family alive.
Well, they could reunite in a moment of great danger. Maybe the White Walkers are attacking again, or there's a new enemy threatening their homeland. Their reunion would then be filled with urgency as they quickly strategize on how to defend their people. Arya might use her stealth skills, and Jon his leadership, to face the threat side by side.
One common plot is Arya being held prisoner by a powerful lord. She then has to find a way to escape while dealing with the lord's cruel demands. For example, he might force her to do menial tasks or endure his taunts.
In this fanfic, Naruto might be tortured for information about the Hidden Leaf. The Akatsuki are known for their ruthless ways, so they could use various jutsu to make him talk.
Jon Snow could be paired with Arya. They could go on a quest to find something important, like a long - lost heirloom of House Stark. Along the way, they share stories of their past adventures and strengthen their bond as siblings, while also facing various challenges from the elements and enemies.
Arya's character might develop in terms of her leadership skills. From being a lone wolf, she has to become a leader. She'll learn to make decisions for the greater good of Winterfell, not just for her own survival.