Do you have a My Hero academia OC? Also have I been an blind idout this whole time and your name is Deku???
Short answer: Yes!
Long answer: fuck yes, i have so many! How much time do you have?
I have a draft on here of just ideas. Not all my ideas panned out or haven't been fleshed out though (some were just a scenario i daydreamed about which i didn't add) and quite a few involve transfer students or something like that. I have like 3 oc ideas for like next gen ocs, i won't put them here though, (one is an Ot3 child, one is a midotsuyu child, and one is a shinsocha just cause i planned the quirk first and uraraka fit best)
Example:
I have one that is essentially if an oc of Fma/fmab was sent through the gate/portal thing similar to in the '03 anime tied with something sorta similar to @nightstorms-universes 's Blair. Like they were sent through the gate before the big battle thing and ended up being born in another universe but still retaining their memories of fma verse. (I am totally leaving out so many details lmao) so they have a mha verse which they have a magic quirk alongside the alchemy from fma, they have a Hp verse, and literally any other fandom i want. Idk how they change universes yet though death is one option or maybe truth pulls them through another portal when they have "learned" something.
I have an oc that is Deku's twin which i named Midoriya "Haruto" Haruo. She was a late bloomer in the quirk department as her quirk didn't manifest until Izuku received OFA. Her quirk is a stronger version of their mother's quirk.I had it where she received a scar on her face from Bakugou when she got between him and Izuku. I paired her with Todoroki.
I have one that is a Todoroki twin oc. Her name is Todoroki Atsuko and there are two Versions of her storyline.
Raised by Endeavor storyline: Grew up alongside her twin, has similar abilities to him except she can change the properties to her flames which allows them to heal instead of harm. She learned this by accidentally healing herself and Shouto a bit not long after their mother scarred them. It wasn't completely healed but it is a lot less bright or noticable. Unlike her Twin, She was not trained by Endeavor or given a recommendation into UA. Shouto helped her a lot with training and was a better and kinder teacher. She took the same entrance exam thing as Deku but was in the same group as Kirishima. I am not 100% on a ship but either Deku, Kirishima, or (if he isn't Touya) Dabi.
Raised by Dabi (who is Touya) storyline: Endeavor basically disowned her when she is still really small because he thought she was quirkless (Touya hasn't disappeared yet). Touya was the one that she had first reached out to as a baby and had gripped his finger. He had taught her to walk, talk, and ride a bike. He had seen her use her quirk (if she has one in this version). If she has a quirk it would be the same as the RbE storyline, Dabi is less scarred though potentially he still would smell like burnt flesh (if that is what he smells like lmao). When Touya becomes Dabi, Atsuko becomes Rin. Probably at least starts as a Villian Au. Maybe she goes undercover in UA and she is the traitor. She is close to Toga. Would probably be shipped with Deku or maybe Kirishima or Denki? There is definitely potential for them to change her side, both for the LI and for her twin. Dabi likely didn't let her know everything just as a precaution since he would know her really well.
More recently i have been playing the beginning idea that gave me Atsuko until the idea of a character with a phoenix quirk hit me (ngl i have had many daydreams involving a phoenix quirk but this one panned out best into an oc). I ship her with Fatgum who is her boyfriend at least. She isn't a hero as she was always verbally shot down by people saying her quirk was not offensive enough to be a hero quirk (or something like that) but idk what job she would have. I ended up daydreaming that she ended up basically strong arming her way into helping Endeavor's kids after his wife was not there so that Fuyumi wouldn't have to act as a mother to her brothers. So fatgum and the oc become like aunt and uncle figures to the kids. Once all might gets injured, the oc kinda pulls him and sir nighteye into the folds. Once they start getting sidekicks; like Tamaki and mirio and kirishima and deku, the oc just adores them all and acts motherly/auntly(?) Toward them. (I currently love this one the best but i need to plan it better *screams*)
I have a quirkless oc with two potential versions. In both, the OC was born in America (i am projecting so :P) and moved to Japan with their father.
Transfer student version: Moved to Japan when her father got a job offer just before she went into High school, the job offered her the chance to apply at UA which she took despite being quirkless, which was another reason she moved as her mom was very much against her ambition to be a quirkless hero, as well as have a translation device in order to help her communicate until she became able to communicate in Japanese by herself. Her dad was a bit worried about that but he went out of his way to give her training she might need from Karate and first aid classes as a child, self defense and boxing classes in middle school, and he taught her to fight with polearms himself. He always encouraged her to figure out ways to counter the quirks of people she met or saw in the media and she became really good at it. She gets into class 1A because she never planned on fighting the robots, she always planned on saving people and because that was her plan she succeeded. Not everyone is happy about it and she almost was last in Aizawa's test thing on the first day but she just barely beat Izuku. She isn't really tactical but she is good at thinking on her feet and taking the option that makes the most sense to her, it often is not the simplest or most logical but somehow works out for her. I ship this version with Shinsou.
Childhood friend version: around the time she learned she was quirkless as a small child, Her dad got a job offer that woyld take him to live in Japan. with little convincing towards her mother aside from not revealing his plan, She was allowed to go with him. He hoped that in Japan, She might be able to accomplish her goal of being a hero despite lacking a quirk. She befriends Izuku on her very first day and often lands in fights with Bakugou which leaves her with a lot of scars but none are very noticable unless looking for them. She ends up either in the general studies or maybe support class? I ship this version with Deku.
That is all i got off the top of my head. Though like i said, i only put the ones that actually panned out into an oc. I have had so many ideas that just stayed as self inserty daydreams that i didn't flesh out or write down and ngl so many of them were shipping with Deku cause i am a huge dork. I did have a few with like Tamaki, Hawks, Kirishima, and Toga too haha.
Just in case @melyaliz / @insideoflit (don't want you to miss it haha)