One interesting fanfiction could be where Mikasa and Armin go on a secret mission together outside the walls. They face many challenges and in the process, their relationship deepens as they rely on each other's strengths. Mikasa's combat skills and Armin's strategic mind work in harmony.
Another theme is growth. They both grow as characters throughout the series, and in fanfictions, this growth is sometimes shown in relation to their relationship. Maybe Armin becomes more confident and Mikasa learns to open up more because of their bond.
There's also 'Armin and Mikasa: A New Chapter' which focuses on their emotional connection. It shows how their friendship might develop into something more. In this fanfiction, they are often seen having deep conversations and relying on one another in difficult situations.
People like it because it offers a different perspective on their relationship. In the original series, their friendship is strong, and fanfiction takes it to another level, exploring romantic possibilities.
One interesting storyline could be them teaming up for a dangerous mission. They both are highly skilled, and seeing them work in tandem, relying on each other's strengths, would be exciting. Levi's experience and Mikasa's determination could lead to a great adventure where they face off against new Titans or a mysterious enemy within the walls.
The contrast between their characters. Annie is strong, stoic and a bit of an enigma, while Armin is more cerebral and empathetic. Their interactions can be really fascinating to explore in fanfiction.
One possible storyline could be that Armin discovers a way to communicate with the Female Titan on a more empathetic level. He tries to understand her motives beyond just being an enemy. Maybe she has some hidden knowledge about the Titans that Armin needs to save humanity.
One possible fanfic could be about Mikasa's transformation into a Titan being a unique situation in the 'Attack on Titan' world. Maybe she has different abilities compared to other Titans. For example, she could retain more of her human consciousness and use her combat skills in Titan form. This would create an interesting dynamic as she tries to protect her friends while being a Titan, which is usually seen as an enemy.
Some fanfics might explore a romantic relationship between them in a more secretive or forbidden way. Given the military setting and the overarching plot of Attack on Titan, their relationship might be something they have to hide. This adds an element of tension and drama to the story, as they navigate their feelings while also dealing with the threats of the Titans and the politics within the walls.
One great 'Attack on Titan Armin x Jean fanfiction' is 'Bonds Beyond the Walls'. It beautifully explores their relationship as they face the challenges of the Titan world together. The story delves deep into their mutual respect and how it evolves into a strong bond. Another is 'Dawn of a New Alliance' which shows them working side by side in a post - Titan - threat world, where their friendship takes on new dimensions.
One popular story might be about their unlikely friendship evolving during their time in the military training. It could explore how Annie's tough exterior starts to crack in the presence of Armin's gentle and intelligent nature.