The relationship can be developed by showing their growth together. Maybe Eren is initially too reckless and Levi is too cold. But as they face challenges, they both change. Eren could become more cautious under Levi's influence, and Levi could become more open - hearted because of Eren. This change should be gradual, not sudden. For instance, it could take several missions and a lot of time spent together for them to really become close friends or something more.
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.
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.
For Levi, as a singer, his personality could be shown as meticulous and perfectionist in his music. He might be initially cold towards Eren but gradually open up as he sees Eren's genuine love for his music. Eren, being a fan, could start off as star - struck but then show his own strong - willed and passionate side as he gets closer to Levi.
There's also 'Eren's New Perspective'. In this fanfic, female Eren brings a fresh view to her relationship with Levi. It delves into how their different personalities clash and mesh. The story often has them facing challenges together and growing closer through shared experiences.
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.
It might develop gradually as Levi helps Eren grow. He would teach Eren things like how to fight, how to be self - sufficient. As Eren learns from Levi, he would start to idolize him. And Levi would see Eren as someone he needs to protect and shape into a good person. Over time, they would become closer, almost like a real father - son duo.
In Levi x Eren fluff fanfics, their relationship is often painted with a lot of emotional depth. They are not just comrades, but something more. There are scenes where they look out for each other's well - being. For instance, when Eren is injured, Levi is the first one by his side, showing his concern not just as a captain but as someone who cares deeply for Eren. And Eren, in return, respects and admires Levi, and this is shown through his eagerness to learn from Levi and his small acts of kindness towards him.
A good 'female eren x levi fanfic' often has well - developed characters. The author should stay true to the core personalities of Eren and Levi while also adding new dimensions due to Eren being female. For example, female Eren might have different emotional responses or ways of interacting.
No, writing such fanfic that involves sexual content is inappropriate. Fanfictions should focus on positive aspects such as character development, friendship, or adventures in the original story's universe rather than sexualizing the characters.
Another theme is redemption. Sometimes, Eren might be portrayed as having made mistakes and Levi is the one to guide him towards redemption. It shows the growth of Eren's character with Levi's help. This theme gives a lot of depth to their relationship.