Hi I made My Hero Acidemia ocs so yeah heres a story.
Also none of this shit is cannon. Maybe a bit... possibly.
My character:

Name: Mika Midoriya
Age: 15
Birthday: July 15th
Gender: Trans Female
Sex: Male
Sexuality: Bisexual, Panromantic
Height: 5'6
Hair: Green
Eyes: Green
Blood Type: O
Quirk: Intense heat, fire breath and ability to turn anyone into an animal

Mikas' backstory:
Mika was born as Midoriya's twin brother, at the age of 5 she developed her quirk, which is a hybrid between her parents, she is able to use natural heat and intensify it to either create fire or create an intense heat. She can also turn people into the animal they're most like, nobody knows where she got this quirk from. These are quite overpowered quirks. Mika didn't go to school as she was critcally ill until most of her life. When she was ten she came out to her mom as trans. She had a bag packed upstairs incase her mother kicked her out. Inko Midoriya at first didn't say anything and Mika broke into tears, Inko rushed to hug her daughter and told her that Mitsuki Bakugo owed her 1,000 Yen. Mika laughed through her tears and Inko, Izuku and Mika had an enjoyable lunch where they talked about Mika's new name and Deku laughed as he claimed to know all along.

What she looks like:
Mika's hair isn't that different from Izuku's, it is slightly longer, is more of a vibrant green and doesn't have the black bits (A/N I know that's shading, just roll with it). Mika's eyebrows are small and rounded, they are also a dark green. Her eyes are the same as Deku's, but with slightly longer eyelashes and her iris's are darker. You know how Deku has four freckles on each cheek? Well Mika has three. Mika is not a lot like Deku, Mika is aggressive and protective. She enjoys fighting Katsuki but if her little brother gets hurt all hell breaks loose. If someone says something homophobic, transphobic, sexist or anything that could be classed as bulling then she will try to murder the person who said it. Mika was unable to do the thing you do to get into UA but she was able to get into UA due to a promise of breadsticks to Principal Nezu. She is in class 1A
This story begins a few days after school at UA starts. It is Mika's first day though. 

Another Oc I made:

Name: Tsuno Rezu
Birthday: July 21st
Gender: Female
Sex: Female
Sexuality: Homosexual
Height: 5'10
Hair: Purple and/or red
Eyes: Orange, yellow
Blood type: AB
Quirk: Dragon

Tsunos' Backstory:
Tsuno's  is a feisty, aggressive girl who is easily angered. She tends to put on less of a show when she's mad. She either intimidates the person with her orange eye, dragon tail and dragon horns, gets her revenge later or lifts her purple/red hair out of the left side of her face and paralyses the person. She doesn't like paralysing people as it can go overboard and severely hurt or kill someone. Another option is to turn into a giant fire dragon but she can only be in dragon mode for 15 minuets before she passes out. Also dragons are dangerous.
When Rey was 5 and her quirk first developed, she accidentally killed her mother. The death was not counted as murder as Rezu was a child and had no control over her quirk. From that day on Tsuno's father abused her. He first forced Rezu to keep half her hair over her dangerous eye, which was logical. Tsuno ended up shaving half her hair to make it look good. Which it does. Every day got progressively more dangerous for Tsuno as her father beat her more. When she was 13, Rezu scratched her father with her long, black claws out of fear. After she did that, her father beat her half to death. Tsuno then called the police and the police arrested the father and tried to take Rezu to a orphanage. Tsuno refused and almost killed the police. Ever since that day, Rezu has trained to make herself stronger, practised using her quirk and made herself at the level of a pro hero at the age of 14. She never shows this off and tends to use her strength to scare off bullies.  Rezu is not depressed in any way. Her past made her strong, not sad.

What she looks like:
Tsuno is extremely tall and muscular looking, her hair is shaved on the right side and the left covers half of her face. The longer left side is more of a reddish-purple colour and the shaved part is a lighter purple. She has two tall horns on her head. The left is an ombre of purple to grey and the right is an ombre of reddish-purple to grey.  Her eyebrows are half reddish-purple and half purple. Her eyes are rectangular and pointed. Her visible iris is a dull orange. The hidden iris is glowing yellow and one look at it could paralyse you. Rey can control the amount of power she puts in her eye. Her skin is beautifully pale but gets red if she gets mad. Her canines are pointed like a dragons but the rest of her teeth are normal. Tsuno's fingernails are black claws. She can retract them into long, sharp nails. When in dragon form, she is a muscular, reddish-purple fire-breathing dragon. If Aizawa used his quirk on her while she was in dragon form, she would turn into her normal form. Aizawa's quirk would not let him take Rezu normal form away. Tsuno Rezu is in class 1A.

And another Oc:
Name: Azi Kito
Birthday: 29th August
Gender: Female
Sex: Female
Sexuality: Aromantic, asexual
Height: 4"11
Hair: Black, used to be yellow
Eyes: Black, used to be green
Blood type: A
Quirk: She can predict the future and put the odds in favour of her chosen outcome. E.g. Willing for her mother to get her icecream, her mother comes home with icecream. This also makes her a little sadder every times she uses it for someone else and she doesn't want the thing they want.
She can also predict the future, but it's hard to to and makes her a little nauseous.
Past:
She was a normal girl, but in middle school people kept asking her to use her quirk for there needs, which gave her minor depression (2017). One day (2018) she yelled "I WISH YOU WERE DEAD" to her mom when she was mad. Two weeks later she was in a car with her mom and she saw a cat on the road. She yelled at her mom to stop the car and her mom hit the brakes. The crash shouldn't have been fatal but Azi's mom died. This gave her major depression, severe anxiety, PTSD (she will never go in a car ever). She ate a lot of sugary stuff out of misery and was bullied for being fat. Now (2019) she has anorexia and is extremely insecure. She has tried to kill herself many times.
Looks:
I'm lazy so here's a pic:

Another Fucking Oc:
Name: Show Yamasaki (I don't remember typing that but let's roll with it, btw this last name is fake)
Age: 17
Height: 5"11                                                                                                                                                                               Quirk: She screech and your quirk gets snatched. Length varies on amount of power in screech and distance 

All the other shit is unknown, you'll find out later. Also she be gay

Another one
Name: Toyoka Shigaraki/Shimura/Todoroki
Birthday: 1st January
Gender: Female
Sex: Female
Sexuality: lesbian
Height: 5"2
Hair: Reddish-pink
Eyes: Purple and dark blue
Blood type: O
Quirk: Produces black flames that disintegrate whatever it touches
Looks:

Backstory: will kinda be explained in the story but yee she be a villain

__________________

This story will not be exact to the timeline of the anime as I haven't watched it all yet.. hehe so here's the order of stuff:

Happened:
The training thing Aizawa did on the first day
To happen:
Another training thing
USJ attack
Sports festival
Internships
Camp
Bakuhoe's kidnapping

Some other stuffs gonna happen to. Don't get triggered if stuff is wrong! It's supposed to be like that!
Also Shinsou is in class 1a because my bby deserves it.