In this fanfic, they might embark on a journey to explore new lands. Arya could learn more about the Faceless Men's ways from Jaquen. Maybe they'll encounter old enemies or make new allies along the way.
Perhaps in the fanfic, their departure is a way to escape the chaos of Westeros. They could start a new life together, away from the wars and politics. Jaquen might teach Arya how to fully embrace her identity as a Faceless Man, or they could simply be on a journey of self - discovery, facing various challenges and growing as characters.
One possible adventure is that they get involved in a heist. Maybe there's a valuable item in a heavily guarded castle, and they plan to steal it. Jaquen could use his skills of disguise and Arya her quick thinking to pull it off. Along the way, they'll face guards, traps, and other obstacles. This adventure would not only be about getting the item but also about their growth as a team.
At first, it could be a teacher - student relationship, with Jaqen teaching Arya more advanced skills of the Faceless Men. As time goes on, they might become comrades, relying on each other in dangerous situations.
Well, in a fanfic where Robb finds Arya, they could immediately start making plans to take back Winterfell. Arya's skills could be a great asset to Robb's military campaigns. They might also share stories of their experiences during their time apart, which could strengthen their bond.
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.
She could change the fate of her family. Since she knows what will happen in the future, she could stop the execution of her father, Ned Stark. This would have a huge impact on the political situation in Westeros. The Stark family might gain more power and influence, and the War of the Five Kings might not even happen or at least take a very different form.
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.
It's possible that they would go on a mission to uncover some long - lost secrets in the world of 'Game of Thrones'. Jaqen's knowledge of the underworld and Arya's determination could lead them to places like the ancient Valyrian ruins. There, they might find powerful artifacts or knowledge that could change the balance of power in Westeros.
She would likely become an even more formidable fighter. With vampire abilities like enhanced speed, strength, and senses, Arya could take on her enemies more easily. Her stealth skills would be amplified, allowing her to sneak up on foes undetected even more effectively. Also, she might struggle with her newfound thirst for blood, which could add an interesting internal conflict to her character.
She'd be shocked. The future would likely have no concept of the Iron Throne or the old feudal systems. Arya would have to quickly figure out how to survive. Maybe she'd use her ability to change faces to blend in, but she'd still stand out because of her archaic fighting style.
One possible plot could be Arya using the brothel as a cover. She might be spying on certain characters who frequent the place. Since she has skills in disguise and stealth, she could blend in among the workers or patrons to gather information for her own purposes, like revenge or to aid in the political chaos of Westeros.