Often, in fanfiction, there is a theme of adventure or facing challenges together. For 'jean x kain', it could be that they are on a quest or facing some sort of external threat that brings them closer together. And in a 'lemon' context (assuming non - adult, like a citrus - related or a symbolically fresh start - type of 'lemon'), it might be a new start for their relationship after a difficult event.
You can try looking on fanfiction - specific websites like Archive of Our Own (AO3). They have a large collection of fan - made stories, and you might be able to find 'jean x kain' fanfiction there.
Friendship or a deeper connection is also a big theme. Despite their differences, they form a bond that is explored in various ways. In some fanfictions, this bond is what helps them save their world or overcome great adversities. It could be a slow - burn relationship where they start as enemies or rivals and gradually become friends or more.
Often, there might be themes of self - discovery. Jean and Armin are both complex characters, and in 'jean x armin lemon fanfiction', they may be on a journey to understand their own feelings for each other better, both romantically and sexually. It can also involve themes of sacrifice and loyalty as they navigate their relationship in a world that might not be fully accepting of it. Another common theme could be the power dynamics between them, whether it's Jean being more assertive or Armin having his own quiet strength that plays a role in their relationship.
One common theme is the power dynamic. Akatsuki Kain often has certain powers or abilities, and exploring how the OC interacts with that, whether in fear, admiration, or trying to equalize it, is popular. Another theme is the discovery of self. The OC might find new aspects of themselves through their relationship with Kain.
One common theme is adventure. Often, the reader and Akatsuki Kain go on some sort of journey together, whether it's through a dangerous magical realm or just exploring an unknown part of their world. Another theme is mystery. Kain himself is a mysterious character, and fanfictions like to play with that, with the reader trying to figure him out.
One common theme is the exploration of Kain's character. Fanfictions often delve into his past, his motives, and how the reader fits into his world. For example, some might focus on how Kain's vampire nature affects his relationship with the reader. There's also the theme of secrecy, as in the Vampire Knight universe, vampires have to keep their identity a secret, and this can add a lot of drama to the relationship between Kain and the reader. Also, themes of loyalty and betrayal can come up, especially when other characters are involved in the story.
One common theme is redemption. Kain might be on a journey to redeem himself and Cecil could play a role in that. Another theme is friendship. Their unique personalities can lead to interesting friendship dynamics in fanfic.
Another theme could be sacrifice. In the context of the original story, they are in a dangerous world. Fanfictions could explore how they are willing to sacrifice for each other. This selfless love, whether it's a romantic or a very deep platonic love, can be a central theme in the fanfiction, without having to involve adult - related themes.
Some fanfictions might focus on an alternate universe scenario. Maybe they're in a modern - day setting instead of the post - apocalyptic world of Attack on Titan. This allows for different dynamics in their relationship, like dealing with normal teenage or young - adult problems rather than titan - fighting ones, which can be really interesting to read about.
One common theme is the clash of personalities. Levi is often seen as strict and no - nonsense, while Jean is more hot - headed. Their interaction based on these differences is a big theme. Another is the idea of comradeship. They are both soldiers, so the fanfictions often explore how they support each other in the military setting.