An interesting concept would be an OC who has a quirk that is based on art. For example, they can bring paintings to life. This OC could be a part of an art school within the My Hero Academia universe and use their quirk to fight villains who are attacking art galleries or museums. They would also have to train their quirk to be more combat - effective.
An interesting concept for a 'boku no hero academia oc fanfic' is an OC who is a villain at first but then slowly realizes the error of their ways. Their quirk could be something that is initially seen as very menacing, like the power to steal the quirks of others temporarily. As the story progresses, they could start using this quirk for good, like helping heroes regain their lost quirks in battles against stronger villains.
One idea could be to create an OC vigilante who has a unique quirk that's not very flashy but extremely useful in stealth situations, like the ability to blend into shadows completely. This would add an interesting dynamic as they could move around unnoticed by villains and even some heroes. Another idea is to have the OC vigilante be from a family with a bad reputation in the hero world, so they have to fight against the stigma while trying to do good.
One idea could be creating an OC with a unique quirk like the ability to control shadows but with a drawback that it only works during a full moon. Another is an OC who is a hero from a foreign country with a quirk based on their cultural heritage, for example, a quirk related to traditional dance forms that can be used to disorient villains. You could also have an OC who is a villain turned hero and has to deal with the prejudice from both sides.
An interesting plot could involve an OC who is initially thought to be quirkless but discovers a latent quirk later on. This OC could then struggle to catch up with the others in terms of training and development. Or, an OC with a shapeshifting quirk could be used in a plot where they have to infiltrate a villain's lair by taking on the form of one of the villains' minions. They would have to be careful not to be discovered and also gather intelligence along the way.
One idea could be that the OC's voice quirk is a secret weapon against a new type of villain who can't be defeated by normal quirks. The OC has to keep their quirk hidden until the right moment. Another plot could involve the OC's voice quirk being stolen by a villain, and they have to find a way to get it back. Maybe the OC uses their voice to communicate with animals in the My Hero Academia world, and this leads to an adventure where they have to stop a group of villains who are using animals for evil purposes.
One idea could be an OC with a unique quirk that doesn't seem powerful at first but has a hidden potential. For example, an OC who can manipulate shadows in a very limited way, but discovers they can use it to travel between dimensions in the shadows. Another could be an OC who is a foreign exchange student with a quirk that is considered abnormal in the My Hero Academia world, like a quirk that allows them to communicate with plants and use them as allies in battle. Or an OC who has a quirk that lets them see the future but only in their dreams, and they have to figure out how to use this information to help their classmates and heroes.
First, give your OC a distinct personality. They could be shy and reserved but with a hidden strength, or super confident and a bit of a troublemaker. Next, design a unique quirk. It could be something related to nature, like controlling plants, or a more mental-based quirk like mind - reading. For appearance, think about what would make them stand out in the My Hero Academia world. Maybe they have colorful hair or a really cool costume. Also, consider their backstory. A tragic past can add depth, like if their family was killed by villains and they are determined to become a hero to avenge them.
One idea could be creating an OC who is a tech genius from a rival school to SFIT. This OC could have a unique set of gadgets that are different from the ones in Big Hero 6. For example, instead of using Baymax's inflatable design, they might have a robotic companion that can transform into various forms like a motorcycle or a glider. Another idea is an OC with a special power related to nature in a world dominated by technology. This could lead to interesting interactions with the Big Hero 6 team as they deal with the contrast between high - tech and natural elements.
One idea could be that the Pokemon have quirks like in My Hero Academia. For example, a Pikachu with an electricity - based quirk that allows it to not only use electric attacks but also manipulate the electricity in unique ways, like creating shields. Another idea is to have the characters from My Hero Academia become Pokemon trainers. Deku could start his journey with a weak - looking Pokemon that he trains to become very powerful, just like he does with his quirk. And a third idea could be to set the Pokemon world in the My Hero Academia universe, where there are both heroes and villains trying to control powerful Pokemon for different purposes.
One idea could be a gamer who gets transported into the Boku no Hero Academia world and has to use their gaming skills to survive and become a hero. For example, they might have an in - game inventory system that they can use to access items that help them in battles.