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.
A very prevalent theme is sacrifice. In the context of Attack on Titan, sacrifice is a big part of the story. Fanfics about Armin and Erwin often show how they are willing to sacrifice for each other or for the greater good. For example, they might put themselves in danger to protect one another. There's also the theme of mentorship. Erwin can be seen as a mentor to Armin, and this relationship dynamic is often explored in fanfics, showing how Armin grows under Erwin's guidance.
One common theme is loyalty. Levi is extremely loyal to Erwin, and this loyalty is often explored in different scenarios in fanfics. Another theme is sacrifice. Given the dangerous world of Attack on Titan, either Erwin or Levi might be put in a position where they have to sacrifice for the other or for the greater good. Also, friendship and comradeship are common. They support each other through tough battles and difficult decisions.
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 popular 'Attack on Titan Armin x Erwin fanfic' is 'The Bonds Beyond the Walls'. It delves deep into their relationship, exploring how they support each other during the tough times in the Survey Corps. Another great one could be 'Shared Visions' which focuses on their strategic minds working together and how that draws them closer on an emotional level.
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.
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.
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.
In many Attack on Titan fanfics about Levi and Erwin, their relationship is often complex and deep. Levi respects Erwin's leadership skills and strategic mind. Erwin, on the other hand, trusts Levi's combat abilities. Their relationship can be seen as a partnership that is crucial for the Survey Corps. They support each other in the face of the Titans and the many challenges within the walls.
One popular trope is the 'unspoken understanding' between them. They can communicate with just a look during crucial moments in battle or decision - making. Another is the 'protective Levi' trope, where Levi is always ready to defend Erwin from any threat, whether it's a Titan or a political enemy within the walls.
One popular theme is the growth of their relationship. Starting from distrust or indifference and evolving into a deep friendship or something more. Another theme could be them facing challenges together, like a particularly difficult Titan attack where their combined skills are put to the test. Also, the theme of sacrifice might be present, where one is willing to sacrifice for the other in a life - or - death situation.