Well, there's the trope of the 'outsider villain'. This is an OC villain who doesn't fit into the normal hero - villain dynamic in the 'Boku no Hero Academia' world. They might have a completely different view on how things should be. Then there's the 'sympathetic villain' trope. Despite being a villain, the writer makes the readers feel sorry for them because of their past or current situation. Also, the 'mastermind villain' who is always one step ahead of the heroes is a common one.
In 'Boku no Hero Academia Izuku x Harem Fanfiction', a popular trope is the 'fish - out - of - water' situation. Since Izuku is suddenly surrounded by a group of girls interested in him, he may find himself in awkward or unexpected social situations. Also, the 'shared secret' trope can be seen. Maybe they all share a secret related to their quirks or a hidden mission, which binds them closer together as a harem. Additionally, the 'jealousy' trope is often present, with the harem members getting jealous of each other's time with Izuku.
Well, in a 'Boku no Hero Academia' fanfic with 'breakdown' in the title, it could be about the breakdown of society as we know it in the BNHA universe. For example, if the hero system fails, how would that impact the different characters? Or perhaps it's about a specific quirk breaking down, like if a quirk starts to malfunction and cause problems for the user. This could lead to interesting storylines where the character has to deal with not only the physical problems but also the social implications.
In fanfics about Shigaraki from Boku no Hero Academia, he is often depicted with more complex backstories. Some fanfics explore his childhood traumas in greater detail, which gives readers a deeper understanding of his motives. For example, they might expand on how his family's neglect led to his current state of mind.
Fanfictions related to Stain from 'boku no hero academia' can vary greatly. Some might depict him as a more sympathetic character, trying to understand his motives for his extreme actions. Others could be more action - oriented, with Stain engaging in battles that we didn't see in the anime or manga. There's also the possibility of exploring his backstory further, like his early days and what led him to become the character we know.
Venom in Boku no Hero Academia fanfiction can add a really interesting and unique element. It could potentially give a character new powers or a different personality. For example, if a hero were to bond with Venom, they might gain enhanced strength and speed, similar to how Venom affects its hosts in the original Venom comics. It also might create an internal struggle within the character as they deal with Venom's more aggressive tendencies.
One great 'Boku no Hero Academia Izuku' fanfic could be one where Izuku discovers a new, hidden quirk within himself that's not related to One For All. This could lead to him having to train in a completely different way and form new relationships with his classmates as they all try to figure out this new aspect of his powers.
I really like 'boku no hero academia shouko fanfic'. The character Shouko is often portrayed in interesting ways in these fanfics. Some fanfics focus on her relationships with other characters from the series, which can add new depth to the overall story. For example, her interactions with the main protagonist can be really heart - warming or full of tension, depending on the writer's take.