One common theme is redemption. Reiner has done many things he's not proud of, and in a relationship with the reader, he may seek redemption through their love and acceptance.
Betrayal is another theme. Given Reiner's double - life and his actions that were against the Scouts, it can create a sense of betrayal in the relationship with the reader, which then has to be overcome.
One popular 'Reiner Braun x Reader' story could be about the reader being a fellow soldier in the Survey Corps. They start off as comrades, but over time, a deeper connection forms. Reiner's complex character, with his hidden motives and internal struggles, makes for an interesting dynamic with the reader.
Another theme might be character development. Writers may focus on the growth and evolution of the characters in the Braun Vault 101 universe. They could explore their backstories, relationships, and how they change over time. This can make the characters more relatable and the story more engaging. Additionally, themes of discovery and exploration could also be prevalent, as characters might be uncovering secrets about the vault or the world it exists in.
Another theme is the exploration of their contrasting personalities. Armin is often seen as the intelligent and more reserved one, while Reiner is the strong - willed and sometimes conflicted. Fanfics play around with how these differences can create an interesting dynamic between them, like in 'The Opposites Attract' fanfic where their differences actually draw them closer.
One common theme is loyalty. Given their long - standing partnership in the series, fanfics often explore how deeply they are loyal to each other, even in the face of difficult choices. For example, they might be loyal to the mission but also to their friendship.
Love and sacrifice are common themes. Often, Reiner has to sacrifice something for the sake of love in these fanfictions. It could be his position in the Legends world or his own safety.
One common theme is friendship. Many fanfics explore how these two very different characters can become friends. For example, they might start off as rivals but gradually realize they have more in common than they thought.
Some fanfics also focus on the psychological aspect of their relationship. Reiner and Bertholdt both have complex personalities and backstories. Fanfics might explore how they understand and support each other on a psychological level, perhaps dealing with their inner demons together.
The theme of trust is crucial in 'Attack on Titan Reiner x Bertholdt fanfiction'. They have to trust each other completely in order to survive in the harsh world of Titans. Additionally, the theme of redemption sometimes shows up. If they make mistakes or have actions that they regret, they try to redeem themselves in the eyes of each other and also within the context of their friendship.
One common theme is loyalty. Given their roles in the story, fanfictions often explore how loyal they are to each other, whether it's in the face of danger or moral conflict. For example, in many stories, they will stick together no matter what decisions they have to make.
Common themes include acceptance, as the characters have to come to terms with their ABDL identity. There's also the theme of belonging. They search for a place where they feel they belong, whether it's among other ABDL individuals or in a more general sense. And the theme of innocence is often present. ABDL stories tend to have an air of innocence, with characters enjoying simple pleasures like wearing cute diapers or playing with stuffed animals in a very pure and uncomplicated way.