Well, in a fanfic where Arya becomes a vampire, her appearance would probably change. She might have paler skin and redder eyes. Her nocturnal activities would increase, and she might avoid sunlight. Her training at the House of Black and White could take on a new dimension as she combines her Faceless Men skills with vampire powers. This could lead to some really unique and exciting adventures as she travels Westeros, perhaps even becoming a sort of supernatural protector or avenger.
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.
If Arya became a vampire in fanfic, it could change her relationships completely. Her family might be horrified or try to find a way to cure her. Her enemies would surely fear her even more. She could use her vampire powers to avenge the wrongs done to her family in a more brutal way. For example, she could quickly dispatch the Freys without them even seeing her coming.
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.
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.
In a fanfiction where Arya and Jon reunite, they might immediately embrace and share their tales. Arya could show Jon her new skills, like her improved swordplay and the faces she has collected. Jon, on the other hand, would tell her about his experiences beyond the Wall and his leadership among the wildlings.
She would have a new set of powers. For instance, she could use her vampire speed to escape dangerous situations much faster. Her story would likely involve more secrecy as she hides her new nature from most people. Only those she truly trusts might know about her being a vampire.
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.
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.
It would be a symbol of hope. In the dark and brutal world of Game of Thrones, family reunions are rare and precious. For Robb to find Arya, it means that a part of their family can be whole again. It also gives both characters a new sense of purpose. Robb now has another reason to fight and survive, to protect his sister. And Arya, who has been alone for so long, has someone she can truly trust again.
Arya's character could develop by facing new moral dilemmas. Being in a brothel, she'd see the exploitation of women and might decide to take action against it. This would add a new layer to her sense of justice.
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.