One common theme is self - discovery. The OC, being a gamer in a new world like My Hero Academia, often has to figure out their place and abilities. Another theme is power - up. Just like in games, the OC usually gets stronger over time.
One good trait is being highly observant. Gamers are used to noticing small details in games, and in the MHA world, this could translate to quickly spotting villains' weak points. Another is adaptability. Just like in games where situations change rapidly, your OC can adapt to different battle scenarios. And determination. If they're used to grinding in games to reach high levels, they'll have the same tenacity when facing tough opponents as a hero.
One popular trope is the 'Gamer Underdog'. The OC is underestimated because their gaming - related quirk seems silly at first, but they prove everyone wrong. Another is the 'Gaming Team - up'. The OC teams up with other heroes who also have quirks that can be useful in a game - like scenario, like a hero who can create mazes and they work together in a virtual - reality - based mission. There's also the 'Gamer Upgrade' trope, where the OC continuously levels up their quirk through gaming - like challenges within the hero world.
First, give your OC (Original Character) a unique quirk. It should be different from the existing ones in My Hero Academia. For example, a quirk that allows them to manipulate virtual reality within the real world. Then, develop their backstory. Maybe they were an avid gamer before getting their quirk and this influenced how they use it. Also, think about their personality. Are they confident like Bakugo or more laid - back like Sero? By focusing on these aspects, you can create an interesting OC for your fanfiction.
First, think about your OC's unique gaming abilities within the My Hero Academia universe. For example, they could have a quirk related to video game mechanics like 'Save Point' where they can rewind time a bit. Then, create a conflict. Maybe they're competing in a hero - gamer tournament against villains in disguise. Another key is to incorporate the existing MHA characters in interesting ways, like having them be mentors or rivals to your OC.
Some characters might be intrigued. For example, Izuku Midoriya would probably be very interested in understanding how the Gamer Sparda powers work. He would see it as a new type of quirk to study and might try to find ways to incorporate the strategies used in the 'game' aspect into his own hero training.
One possible plot could be an OC who is a gamer and discovers they can use their gaming skills in the My Hero Academia world. For example, they might be really good at strategic planning in games, and this helps them create unique battle strategies against villains. They could start as an underdog, with classmates doubting their abilities because they seem more focused on gaming than hero training. But as they prove themselves in battles, they gain respect and also inspire others to think outside the box when it comes to heroics.
Katsuki Bakugo is also a common character. His explosive personality can be interestingly combined with the gamer concept. Maybe a gamer - like Bakugo who is always looking for the next 'level up' in terms of his quirk strength and hero status, constantly challenging others in a competitive, almost game - like way.
I really liked 'Gamer Izuku's Ascent'. In this fanfiction, Izuku starts with his gamer skills and slowly builds his reputation as a hero. It shows how he uses his unique skills to outwit villains and make friends along the way. There are some really cool action scenes and character developments.
There are quite a few'my hero academia gamer oc fanfiction' out there. For example, 'Gamer OC: Rising to the Top'. This story is about an OC who uses their gamer abilities not just for combat but also for strategic planning within the hero school. The OC has to deal with rivalries, make friends, and prove themselves worthy of being a hero, all while using their unique gaming - inspired powers.