One common theme is power exploration. Since both BNHA and BSD have characters with unique abilities, fanfics often explore how these powers interact and combine. For example, a character's quirk from BNHA might be used in an unexpected way when paired with a power from BSD.
There's also 'Jujutsu and Bungo in an Alternate Realm'. This fanfic delves deep into how the powers from both universes would interact. It shows the characters trying to understand each other's abilities and form alliances. It's a long read but definitely worth it for fans of both series.
It's fairly common. Fans often look for more content related to their favorite shows. Since 'Attack on Titan' has a large and passionate fan base, there are a lot of fanfics available. 'Aot' fans might watch (read) these fanfics to explore different scenarios that the official story didn't cover. For example, they might want to see how a certain character would react in a different situation or what would happen if a major plot event had a different outcome.
Well, there's a 'bnha x bsd fanfic' named 'Allied Powers'. In this fic, the author does a great job of making the two different worlds interact. It shows how the characters from My Hero Academia and Bungo Stray Dogs might work together, fight together, and even form new relationships. It's full of action and some really cool crossovers of their powers.
There's also 'Mike and Nanaba: A Different Perspective'. This fanfic takes a unique approach by showing their relationship from the perspective of other characters in the series. It gives a fresh look at how their relationship might be perceived by those around them.
Self - discovery can be a theme as well. The reader, through their experiences with the AoT girls, may learn more about themselves, their strengths, and their weaknesses. It's a way to explore the character's growth within the unique context of the Attack on Titan universe.
Another theme is mutual understanding. Despite their different personalities, they seem to understand each other on a level that others don't. Fanfics often play on this, showing how they can communicate without words at times. For example, in some stories, Levi can tell when Hanji is about to do something reckless just by a look in her eyes. And Hanji can sense when Levi is more stressed than usual. This mutual understanding forms the basis of many emotional and plot - driving moments in the fanfics.
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 redemption also shows up. The Winter Soldier may see his time in the AOT world as a chance to atone for his past actions. He uses his abilities to protect the people in the AOT world, and in doing so, he starts to find a sense of purpose and redemption that he may not have had before.
One great AOT Sasha x Male Reader fanfiction is 'Sasha's Unlikely Bond'. It beautifully portrays the relationship development between Sasha and the male reader. The story starts with them meeting during a training session in the Survey Corps. Their interactions are initially filled with Sasha's typical food - loving antics and the male reader's admiration for her unique charm. As the story progresses, they face challenges together, like surviving a Titan encounter, which deepens their connection.