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 common theme is identity. Since Eren is female in these fanfictions, there's often exploration of how she fits into the world that was originally designed around a male Eren. Another theme is relationships, like her friendships or potential romances with other characters in a different light.
Often, a strong female character is a key element. She may have her own goals and motives that interact with Eren's journey. For example, she could be on a mission to save her family and crosses paths with Eren.
Well, Eren Jaeger's transformation into the monster of the story is a complex process. He witnessed so much pain and suffering, especially the loss of his loved ones. This, combined with the power he gained, made him believe that only by using extreme force could he achieve his goals. He was no longer the naive boy he once was, but a force of destruction, ready to sacrifice countless lives for his vision of freedom, which ultimately made him seem like a monster in the eyes of many.
One consequence is the destruction of relationships. His friends who once trusted him are now conflicted. They have to decide whether to stop him or try to understand his motives. Another consequence is the chaos in the world. His actions as a'monster' have led to more wars and destruction.
Fanfiction about Eren and Levi kissing can be quite interesting. It might explore a different side of their relationship. Some fanfictions in this regard could be about a moment of emotional intensity between them, where the kiss represents a deep connection that goes beyond their usual interactions in the original story.
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.
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.
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.