One popular plot idea is the self - insert character having a unique quirk that changes the power dynamics in the My Hero Academia world. For example, a time - based quirk that can rewind or fast - forward events, which can be used for both heroic and villainous purposes depending on the character's moral alignment.
Some SI fanfictions also focus on the self - insert becoming a mentor to the main characters. Imagine an SI who has experienced a lot in their own world and uses that knowledge to guide Deku, Bakugo, and the others. This could involve teaching them new combat techniques or helping them deal with the psychological pressures of being a hero.
One popular plot idea could be American heroes teaming up with the Japanese heroes from the original My Hero Academia. For example, they might join forces to combat a new super - villain threat that is spreading across both countries. Another idea could be an American student with a unique quirk transferring to U.A. High School in Japan and having to adjust to the different hero - training culture there.
One popular idea is the relationship between Midoriya and Bakugo. Fans like to explore how their complex dynamic could develop into something more in a slash context. Another is Todoroki and Deku, imagining their friendship evolving into a romantic relationship. And also Kirishima and Bakugo, as their strong bond can be seen in different ways in slash fanfictions.
One great plot idea is having your SI OC be a transfer student from a foreign hero school. They bring in new techniques and a different perspective on heroics. Another idea could be that your OC has a quirk that is initially seen as a villain's quirk, and they have to prove that it can be used for good. For example, a quirk that allows them to control minds but they use it only for interrogation purposes in hero work.
One plot idea could be that the Saiyan OC is mistaken for a new type of villain at first. As they try to prove they're not a threat, they start to make friends and learn about heroism. Another idea is that they discover a connection between Saiyan powers and some of the hidden secrets in the MHA world. Maybe there's an ancient power source that only a Saiyan can unlock.
One plot idea could be a villain who is secretly a double agent, working for the heroes all along. They infiltrate the villain group and gather information. Another idea is a hero who loses their quirk and has to rely on their wits and combat skills alone, like Batman in the DC universe. And a villain - hero team - up to face a greater threat that neither can handle alone.
An interesting plot could involve an anti - hero who has a hidden agenda that is not entirely evil but also not in line with the traditional hero goals. Maybe they are trying to expose a corrupt part of the hero society from within. They could form alliances with some villains who also have a vendetta against the corrupt elements. This would create a complex web of relationships and moral dilemmas.
One popular plot idea could be a training session gone wrong. Katsuki's brashness and Ochako's determination clash during a joint training exercise, but this conflict eventually leads to a deeper understanding of each other. Another idea is a mission where they are forced to rely on each other. In a dangerous situation, Katsuki's power and Ochako's unique quirk work together in unexpected ways, sparking new feelings between them. A third idea could be a school event where they get paired up for a project. They start off at odds but as they work on the project, they discover they have more in common than they thought.
One idea could be a crossover where the students from Little Witch Academia visit UA High. They could participate in a joint training exercise. The witches could use their magic in creative ways during combat scenarios, while the heroes-in-training show off their quirks. It would be a fun mix of different powers and personalities.
A more relaxing plot could be a beach vacation where the characters just unwind. They could build sandcastles, have picnics, and share stories. But of course, there could be some small challenges like dealing with a sudden rainstorm or a seagull stealing their food.
A great plot idea could be Shinsou going undercover in a villain organization. Since his quirk is so useful for deception, he could infiltrate and gather intel. Or perhaps a story where Shinsou has to train a group of new students with difficult - to - control quirks. He'd have to use his own experiences and his mind - control quirk in a mentoring way. Also, a plot where Shinsou discovers a new aspect of his quirk during a life - or - death battle, which gives him an edge and changes the course of the fight.