In a fanfiction, Arya might find a lemon charm that has some sort of magic. Catelyn, in the afterlife or in Arya's dreams, could communicate with her through the lemon charm. Arya then has to figure out how to use this connection to either avenge her family further or to bring some sort of peace to the war - torn land of Westeros. The lemon could be a symbol of hope and connection between the two.
One idea could be that Arya, while on her travels, comes across a lemon tree in a strange land. She remembers her mother Catelyn's love for the smell of fresh things. So, she decides to take some lemons with her to bring a bit of home. When she finally returns to a place where she can reunite with Catelyn's memory, perhaps through an old family friend, she uses the lemons to make a special drink or offering in her mother's honor.
Perhaps Arya is in a situation where she is ill and the only remedy seems to be something made with lemons. Catelyn, in Arya's delirious state, appears to her as a guiding figure. Arya then has to fight through her sickness with the memory of her mother and the power she believes the lemons hold. She might meet someone who helps her with the lemon - based remedy and this person could become an important ally in her future adventures.
Arya could use a lemon as a secret signal related to her family. Catelyn taught her this long ago. So when Arya is in a dangerous situation, she leaves a lemon as a sign that she is from House Stark. This way, it becomes a connection between her and her mother's teachings.
Perhaps the lemon is a key element in a prophecy. In this fanfiction, Catelyn has a vision that involves a lemon, Arya, and elements from the Harry Potter universe such as Hogwarts. Arya is on a quest to find out more about this prophecy. She teams up with characters from both worlds, and together they try to decipher the meaning of the lemon in the prophecy. It could be that the lemon represents a source of power that can either save or destroy their world, much like the Horcruxes in Harry Potter.
Catelyn Stark is interesting for fanfiction because of her complex personality. She is a strong - willed woman in a male - dominated world. Her loyalty to her family is unwavering, yet she also has to make tough decisions that sometimes put her at odds with others. This creates a lot of potential for different storylines in fanfiction.
One idea could be a story where Arya meets Lemon in a tavern during her travels. Maybe Lemon has some interesting information about Arya's enemies, and they form an unlikely alliance to take on a common foe.
One possible fanfiction could be about Kinvara using her magic in a way that is related to lemons. Maybe she uses lemon - scented oils in some sort of ritual. However, I haven't actually read a specific fanfiction on this exact topic, but it could be a really unique concept.
One possible plot could be that Harry and Sirius are somehow transported to the world of Game of Thrones. Harry could use his magic skills to survive in the cut - throat world, while Sirius, with his werewolf - like abilities (from being an Animagus), could be a fearsome fighter. They might get involved in the power struggles between the different houses, perhaps siding with the Starks as they are known for their honor. They could use their knowledge from the wizarding world to introduce new concepts like magic (though it might be seen as sorcery in that world) and change the course of the wars in Westeros.
In some fanfiction, Arya and the Hound might have a heart - to - heart conversation about their pasts. The Hound could open up about his troubled childhood, and Arya could share her experiences in the House of Black and White. This would deepen their bond in a more emotional way.
Perhaps in some fanfiction, Gendry and Arya decide to start a new life away from the politics and chaos. They could build a home near the sea, where Gendry can practice his smithing and Arya can train in peace. They face challenges like building a community and dealing with local bandits, but their bond grows stronger through it all.
In some fanfictions, there could be a story where Arya and Jon discover a long - lost family secret that changes their understanding of their heritage. This could involve some sort of magical or political revelation that binds them closer together and gives them a new mission. For example, they might find out that there is a hidden power in their bloodline that can save Westeros from a greater danger.
One interesting scenario could be Arya disguising herself as a servant in Tywin's camp. She could overhear his strategic plans and use that information to her advantage later. Maybe she even manages to steal something important from him without him realizing it was her.