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 common theme is loyalty. Armin and Erwin are both extremely loyal to their comrades and to each other. In fanfics, this loyalty often becomes a central aspect of their relationship. Another theme is leadership. They are both leaders in their own ways, and fanfics might explore how they lead together or support each other's leadership.
One common theme is redemption. Annie has done some pretty bad things in the series, and in many fanfics, Armin is a key figure in her journey towards redemption. Another theme is love in the face of chaos. Given the world they live in, filled with Titans and danger, their love is often portrayed as something that can survive and even thrive in such a harsh environment. Also, the theme of understanding each other's pasts is quite common. They both have complex backstories, and fanfics often explore how they come to understand and accept each other's past traumas.
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.
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.
One common theme is the exploration of the blurry line between friend and foe. Since the Female Titan is initially an enemy, fanfictions often delve into whether she can become an ally through her interactions with Armin. For example, Armin might try to convince her to side with the humans.
Well, AO3 is the go - to place. It has a great search function that allows you to specifically look for Armin x Jean fanfiction from 'Attack on Titan'. You can also try Wattpad, although it has a more mixed bag of content. Sometimes, Tumblr might also have links or short fanfictions related to this pairing if you search through the relevant tags.
You can try fanfiction websites like Archive of Our Own (AO3). There are a large number of Attack on Titan fanfics there, including ones about Jean and Armin. Just use the search function and type in 'Jean x Armin' within the Attack on Titan fandom section.
One common theme is friendship. They support each other through the difficult times in the 'Attack on Titan' universe. Another theme could be growth. Jean's character development, often influenced by Marco, is frequently explored. Also, loyalty is there, as they are loyal to each other and to their cause of fighting Titans.
Power dynamics is a frequent theme. The Female Titan has great physical power, while Armin has intellectual power. Fanfics often play with how these two types of power interact in their relationship. Another theme could be redemption. Maybe the Female Titan is seeking redemption through her connection with Armin. It could also be about understanding the 'other'. Armin tries to understand the Female Titan, who is different from him in many ways, and vice versa.
One popular theme is friendship development. Since they start off with different outlooks, seeing how they grow to respect and care for each other is a common and appealing theme. Another theme could be their shared goals. In the context of their world, they may have certain missions or ideals that they pursue together, and this can be a central focus of the fanfic.