My Hero Academia - An assassin as a hero!? (Izuku x OC/Reader)

Prologue

HEYAA! I'm back with another fanfic! Yay! Since I absolutely LOVE x Reader/OC fanfics and I haven't done one on BNHA yet, I decided why not! Some stuff here may sound a little ridiculous, but please just bear with me! Pleaaase! 

Enough chitchat. You came here to read a fanfic, so let's get this show on the road!

"I don't remember much of my early childhood. Or rather - I don't want to remember. I only recall it as one thing. Hell."

"The countless hours of torture training I had to endure every single day, living the life of an assassin, were unimaginably painful."

"They did, however, make me immune to poison, make me able to withstand up to 2,3 million volts, make me able to easily snap a bone or cut myself without thinking much of it."

(If you get who I'm basing this off of, then crops to you! >-<)

"I was my family's biggest pride. I was already completely immune after the age of 6, which is where my intense killing training began."

"I was a prodigy. Of course - our "family business" is considered a top-ranked secret that must never be mentioned to anyone."

"Because of my intense training, I'm also able to stay awake for 4-5 days and have my brain on constant alert while sleeping."

"My physical strength and speed are also FAR above anyone else on my age, or well - practically anyone who doesn't have an intense strength or speed increasing quirk."

"I had to continue school as a "normal" child, even though it was clear that I wasn't like the others. I never cried, I never smiled and I never socialized with anybody."

"However - at age 7, my parents found it strange that my quirk hadn't developed yet, so they got me tested."

"Seemed I was quirkless... After that, the kids in my school heartlessly started picking on me, calling me names, but they quickly learned to stay away, as a group of girls was foolish enough to try and beat me up one day."

"I hospitalized all of them and was expelled as a result. It's an understatement to say that my parents were mad."

"They were beyond furious, and said, that as my punishment, I would have to serve 3 years in intense assassin service while being homeschooled."

"I've completely lost count of how many people I've killed at this point."

"I had to excel at everything. When you assassinate somebody, you don't have the time to hesitate. You must strike with ONE finishing blow, that is the most important rule of an assassin."

"Of course, there's also the fact that the job is never allowed to end in failure. Failure means execution."

"As you can probably see, I had a fairly rough childhood. Can't say I ever had a real friend."

"Well, as mentioned before this is how my life USED to be. Something rash happened that changed it one day."

"I had just finished a job on a stuck-up businessman, and I was preparing my leave, assuring I didn't leave any traces behind."

"One of the biggest challenges of us assassins is constantly avoiding the heroes. They are literally everywhere, but so is the scum of this city, so what can you do?."

"As mentioned before, I was just about to take my leave...I was around 12 at the time.."

FLASHBACK BEGINNING:

I walk out of the office, making sure no witnesses are around. After I double-check, I soundlessly jump up into the vent system and prepare to leave the building.