To create a compelling OC (Original Character) for a My Hero Academia reincarnation fanfiction, first consider their quirk. It should be unique yet fit within the world's power system. For example, a quirk like 'Elemental Mimicry' where the character can mimic the properties of different elements. Then, think about their backstory. Maybe they were an ordinary person in their past life who had a strong sense of justice. This could fuel their actions in the new world of heroes and villains. Also, give them flaws. A character who is too perfect is uninteresting. Maybe they're overly impulsive or have a fear of heights which could add depth to their story.
One common plot idea is the OC trying to become the top hero. They use their knowledge from their past life to gain an edge. For example, they know the training methods of the best heroes and apply them to their own training. Another idea is the OC changing the fate of certain characters. Maybe in the original story, a side character dies, but the OC intervenes to save them. Or they could be involved in uncovering a conspiracy within the hero society that was hidden in the original story.
Another common trope is the main character having memories of their past life. This often leads to them having a different perspective on the events in the MHA universe. They might use their knowledge of the original story to their advantage, like knowing the weaknesses of certain villains or the secrets of powerful heroes.
First, think about their Saiyan powers and how they would translate in the My Hero Academia world. For example, a Saiyan's ability to increase power level could be like a quirk that gets stronger over time. Consider their backstory, like maybe they're a Saiyan from another planet who ends up in the MHA world. Also, their appearance can combine Saiyan features like a tail and spiky hair with the MHA style of clothing.
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.
A more complex plot could be that the OC reincarnates into a world where the events of 'boku no hero academia' have taken a different turn. Maybe All Might was defeated much earlier and the villains are in almost complete control. The OC has to find a way to gather the remaining heroes, train them in new ways, and inspire hope again. This would involve a lot of character development as the OC has to prove themselves to the jaded heroes and also face the very powerful villains.
First, give your OC a unique quirk that has both strengths and flaws. For example, a quirk that can control fire but has a time limit. Then, develop a backstory that explains why they become an anti - hero. Maybe they've been wronged by society or have a different view of heroism. Also, think about their relationships with other characters in the My Hero Academia world. Do they have friends among the villains or heroes? This can add depth to their character.
The male OC could be designed with a laid - back personality but with a hidden intensity when it comes to using his quirk. Physically, he could have longish hair that he often brushes out of his face in a cool way. He might wear a combination of modern streetwear and some traditional hero - like accessories, like a cape - like scarf. His quirk could be related to energy projection, which gives him an edgy look when he uses it, with glowing energy coming from his hands.
To create a compelling dark OC in My Hero Academia fanfiction, start with a strong motivation. It could be envy towards the heroes' popularity or a desire for power at any cost. Their quirk should be something that can cause chaos, like a mind - control quirk but with limitations such as it only works on those with weak wills. Appearance - wise, they could have a scar or some disfigurement that adds to their intimidating factor. And don't forget to give them a name that suits their dark persona.
First, think about their quirk. It should be unique yet fit within the MHA universe. For example, a quirk like 'Shadow Manipulation' could be cool. Then, consider their backstory. Maybe they had a difficult childhood that led to their determination. Also, give them a distinct personality, like being a bit of a loner but with a big heart.