One theme is the adaptation of the original story's power dynamics. In a genderbend harem fanfiction of Boku no Hero Academia, the powers might be used in different ways depending on the new gender of the characters. Also, friendship and rivalry often play a role. The characters in the harem may be friends who also compete for the affection of the main character, or they could be rivals who gradually develop feelings for each other.
Obviously, Izuku Midoriya is the central character. Then there are often characters like Ochaco Uraraka, who could be part of the harem as she has shown an interest in Izuku in the original series. Tsuyu Asui might also be included as she is a close friend and could potentially develop deeper feelings for Izuku in fanfiction.
Power and how it attracts others is often a theme. In these fanfictions, the main character with unique powers, like Naruto's Nine - Tails chakra or a hero's quirk in Boku no Hero Academia, might draw the attention of multiple characters, leading to a harem situation. Also, the idea of friendship evolving into something more within the harem is quite common.
A major theme is also the idea of support. The characters in the harem are often there to support Izuku in his journey to become a great hero. This can include emotional support, like when he's feeling down about his progress, or practical support during battles or training. And of course, there's the theme of love and attraction, which is a fundamental part of any harem story. Different characters in the harem will show their love for Izuku in various ways, whether it's through acts of kindness, protecting him, or just being there for him.
Another plot could involve Izuku being in a situation where his harem has to work together to protect him. Maybe they find out about a secret plot against Izuku and combine their unique quirks to keep him safe. This would show the different relationships he has with each of them and how they interact as a group.
Power and responsibility is also a common theme. Just like in the original 'Boku no Hero Academia', the OC in these fanfictions has to balance his new - found powers with the responsibility of being in a harem. For example, he has to protect his harem members while also using his powers for the greater good. It's a complex dynamic that adds depth to the story.
In fanfictions, Mina Ashido might be in Izuku's harem. Her energetic and fun - loving personality could add a lot of color to the harem. Jirou Kyoka could also be a potential member. Her musical quirk and her somewhat reserved nature could create an interesting contrast with Izuku. And then there's Toru Hagakure. Her invisible quirk and her friendly personality could make her a unique addition to Izuku's group of love interests.
One popular 'boku no hero academia genderbend harem fanfiction' is 'Heroine Academia'. It offers a unique take on the original story with gender - swapped characters in a harem - like setting. The character interactions are interesting as it flips the traditional dynamics. Another one could be 'Genderbent Heroes' which delves deep into how the changed genders affect the characters' relationships and their heroic journey in the My Hero Academia universe.
Often, in these fanfictions, there are plotlines where Deku's unique quirk plays a role in attracting the female characters. His selfless and heroic nature, which is enhanced by his quirk, makes him appealing. Some fanfictions might also have a plotline where Deku has to deal with jealousy or competition among the members of his harem, adding drama to the story.
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.