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.
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.
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.
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.
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.
One popular trope is the 'enemies to lovers' dynamic. Given their positions as former enemies in the main story, it's common for fanfictions to explore how they transition from hostility to love. Another trope is the 'hurt/comfort' where, for example, Annie might be injured or in distress, and Armin is there to comfort her, which deepens their bond.
One popular theme is their friendship evolution. As they grow up in the dangerous world of Attack on Titan, their bond changes and deepens. Another theme could be sacrifice. How far would Eren or Armin go to protect each other? And there's also the theme of trust. Given the complex and often deadly situations they face, trust between them is crucial and can be a major focus in fanfiction.
One aspect to consider in this fanfiction could be the extreme devotion Mikasa has in a yandere state. Yandere characters are known for their obsessive love, and Mikasa's love for Eren was already intense in the original series. In the fanfiction, this might be amplified, leading to situations where she becomes overprotective and possessive of Eren, perhaps even to the point of excluding others from his life. This could create a lot of drama and conflict, especially when Eren's own goals and relationships with other characters are taken into account.
In Attack on Titan fanfiction, Levi and Mikasa's relationship can be quite interesting. They are both strong and skilled fighters. Their relationship might start from mutual respect for each other's abilities. Levi could see Mikasa's determination and be reminded of his own. Mikasa, on the other hand, might look up to Levi as a more experienced and powerful comrade. In some fanfictions, their relationship could develop into a deep friendship or even a romantic one, with them relying on each other in the face of the Titans and the complex politics within the walls.
Yes, it can be quite popular among fans who enjoy crossovers. Combining the worlds of 'Attack on Titan' and 'Naruto' while involving a relationship like Naruto x Mikasa creates an interesting and unique scenario. Fans of both series often like to explore how different characters from separate universes would interact, and fanfiction is a great way to do that.