One common theme is redemption. For example, they might go back in time to correct past mistakes either in their own actions or in the events related to the fight against Titans. Another theme is the exploration of their relationship. Time travel can be a tool to show how their relationship could have developed differently under different circumstances. For instance, in some fanfictions, they may have met earlier in a different time period and their initial interactions are quite different from the original story.
One popular 'eren jaeger x levi time travel fanfiction' is 'Through Time and Titans'. It has an interesting plot where Eren and Levi are sent back in time and have to deal with their past selves while also trying to change the future of the world against the Titans. Another one could be 'Time's Twist' which focuses more on the emotional journey of Eren and Levi as they travel through different time periods and how their relationship evolves during these travels.
One idea could be a story where Levi and Eren are on a dangerous mission together. They start off not getting along well due to their different personalities. Levi is strict and methodical while Eren is impulsive. But as the mission progresses, they gradually learn to understand and rely on each other. For example, Eren might save Levi from a Titan in a moment of quick thinking, and Levi in turn teaches Eren some crucial combat skills.
One aspect of Levi x Eren family fanfiction could be the exploration of their relationship in a family - like dynamic. It might involve how they support and protect each other within this new family structure. For example, Levi could be a strict but caring figure, while Eren is the one with new - found responsibilities in this family.
Female Eren in this fanfiction is often portrayed as headstrong. Just like her male counterpart, she has a strong sense of justice and is determined to fight for what she believes in. She is also likely to be brave, not afraid to face danger head - on, whether it's in battle or when confronting the complex relationship with Levi.
It's hard to say. 'Levi x Eren' fanfics are quite common in certain fandoms, but the 'Levi is a criminal' aspect makes it a more specific and perhaps niche sub - genre. If there are a lot of fans who like to see dark or morally ambiguous takes on the characters, it could potentially be popular within that subset of the fandom. However, it also might not be mainstream popular as it goes against the more typical heroic portrayals of the characters.
To develop their relationship realistically, let them communicate. Have them have conversations about their pasts, their goals. Eren might talk about his family and his drive to avenge them, and Levi could share some of his own traumas from his past. This would create a deeper understanding between them. Also, small acts of kindness like Levi patching up Eren's wounds after a fight or Eren getting Levi his favorite tea could strengthen their bond.
Maybe Levi is a criminal in the sense that he's part of an underground rebellion against an unjust regime. Eren, who is initially on the side of the establishment, meets Levi and gradually comes to understand his motives. Their relationship could develop as Eren has to decide whether to side with Levi or stay loyal to the regime, all while a romantic connection forms between them.
The eren x levi lemon comic could potentially feature explicit or intense interactions between the characters. But the details would depend on the creator's imagination and style.