One idea could be a crossover where Naruto is transported to the world of Westeros. He meets Arya Stark and they team up. Naruto could teach Arya some of his ninja skills, like how to move stealthily like a shinobi. This would enhance Arya's ability to seek revenge on her enemies in a more efficient way.
Arya's skills in disguise and stealth could be combined with Naruto's shadow clone jutsu. For instance, Naruto could create clones that are disguised as Arya or vice versa, confusing their enemies. This way they can launch surprise attacks.
In a fanfiction about Arya Stark being pregnant, she might be in a situation where she has to keep her pregnancy a secret. Maybe she's in a land where her enemies are everywhere, and if they find out, they'll use it against her. She could rely on her skills of disguise and stealth to hide her condition as she tries to find a safe place for herself and her baby.
One possible plot could be that Arya Stark, through some magical or cross - dimensional event, ends up in the Naruto universe. She could learn chakra control and ninjutsu, while also teaching the Naruto characters her skills of stealth and assassination. For example, she might train Sakura in silent killing techniques, which could add a new dimension to Sakura's combat abilities.
There are also fanfictions where Arya is betrayed by someone she thought was a friend. This is a very hurtful situation for her as she has always been cautious about who to trust. When this trust is broken, it can lead to a downward spiral of emotions for her, and it makes for a very emotional read for the fans.
Writers often use descriptive language to show Arya's physical pain. For example, they might write about her wounds, how she winces when she moves, or the blood seeping from her cuts. This makes the readers visualize her in pain.
One great male Arya Stark fanfiction is 'The Other Side of Arya'. It explores an alternate universe where Arya is male and how that changes her, well, his relationships and the power dynamics in Westeros. Another one could be 'Male Arya's Journey', which focuses on his adventures and training in a more detailed way compared to the original story. There are also some on fanfiction.net that are worth checking out.
I really like 'Arya and the Lost Soul'. The OC in this fanfic is a young girl with magical powers who crosses paths with Arya. Their adventures together are full of action and heart - warming moments. Also, 'Arya's Shadow' is worth checking out. The OC is a stealthy figure who becomes Arya's protector in a dangerous world, and the way their relationship develops is fascinating.
One idea could be Arya using her Faceless Man skills to avenge the wrongs done to her family. She could infiltrate the enemies' strongholds unnoticed and take them out one by one.
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.