Well, 'Jaqen's Return to Arya' is another good one. In this fanfic, after a long separation, Jaqen comes back into Arya's life and they face new challenges together. It's full of twists and turns that keep you on the edge of your seat.
There is a fanfic called 'Jaqen's Oath'. It's about Jaqen making an oath to protect Arya at all costs. The story is full of action and adventure as they face various threats together. The author does a great job of building the tension between them. Additionally, 'Arya and Jaqen: A New Alliance' shows how they form an unexpected alliance against a common enemy and how their relationship evolves during this time.
For Arya, focus on her growth from a vengeful girl to a more complex character. Show her learning from Jaqen, not just in terms of skills but also in understanding different ways of life. Let her struggle with her identity as she is influenced by Jaqen.
Another plot could be centered around Jaqen teaching Arya some of his unique skills. Arya is already a skilled assassin, but Jaqen has his own brand of magic - like his ability to change his face. He could pass on some of this knowledge to Arya, and they could use it to infiltrate enemy strongholds and carry out their plans.
One common theme is the growth of Arya. With Jaqen in the story, Arya often has to learn new things, whether it's about combat or about the world around her, so her growth as a character is a big part.
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.
Arya may become more confident in her abilities with Jaqen's guidance. She could grow from a somewhat reckless girl into a more calculated and strategic assassin. For example, she might learn to better plan her attacks instead of acting on impulse all the time.
Perhaps in the fanfiction, Arya and Jaqen form an unexpected bond due to the pregnancy. Jaqen, who is usually a mysterious and somewhat aloof character, could show a more caring and protective side. They might have to find a safe place to stay, away from the chaos of their normal lives, and figure out how to raise a child in a world full of danger and intrigue.
One common theme is the exploration of their relationship. Whether it's a romantic relationship or a complex friendship, it's often at the center. Another theme is power and identity. Arya is constantly evolving in terms of her power and identity, and Jaqen is this mysterious figure with his own sense of self. Their interactions often revolve around these aspects.
I haven't come across a fanfiction with that exact plot. Fanfiction often explores different relationships and storylines in the 'Game of Thrones' universe. While Arya and Jaqen have an interesting relationship, pregnancy isn't a typical aspect explored in mainstream fanfictions about them. It could be that it exists in some more niche or less well - known works, but it's not something I've seen frequently.
One great 'Assasin Arya fanfic' is 'Arya's New Path'. It shows Arya using her assassin skills in a different way, facing new challenges and making unexpected alliances.