For as long as Izuku could remember, he felt nothing.
Love? Sure, he supposed he loved his mother. She had birthed him, fed him, taken care of him, worried over him. Inko Midoriya most definitely loved her son, so Izuku would wager somewhere in him, there may have been an ounce of love for the woman.
He couldn't find it, but it was probably there.
Hatred? Izuku honestly couldn't say. He was quirkless, so he was made fun of quite a bit. Top tormentor was his ex best friend, Katsuki Bakugou(Could Izuku even say that? He thought you had to feel something towards someone for them to be a friend). Sure, there were plenty of reasons for Izuku to hate him. Katsuki would constantly belittle him, hit him, use his explosion quirk on him. Hell, Katsuki hadn't even called him by his real name in years, preferring to use the nickname Deku as a way to mock his uselessness for not having a quirk of his own. But Izuku couldn't bring himself to hate Katsuki. He certainly didn't love Katsuki, but he didn't hate him either.
Happiness? He couldn't recall a single time he had been happy.
Sad? Nope, he drew a blank.
Anger? Nothing.
Izuku Midoriya simply did not have emotions.
Sure, he could smile, he could frown, he could cry, but it was always fake, simple plastic plastered onto the visage of his face in an effort to seem normal.
Izuku was not normal.
At four years old, he learned of his quirklessness. Any other kid would be devastated.
Izuku didn't care.
He wanted to be a hero, but who didn't?
It was just another attempt for Izuku to seem normal.
Katsuki took exception to that.
"If you want to be a hero so bad, why don't you do yourself a favor and take a swan dive off the roof" The sneering voice of Katsuki Bakugou called out to the blank faced Izuku "Pray you'll be born with a quirk in the next life" He laughed. Laughed on his way out.
For the first time in his life, Izuku felt.
Slowly, Izuku followed Bakugou out of the classroom, his blank, expressionless face only ever so slightly scrunched into a frown. Nothing noticeable. But Izuku knew it was there. And it was real.
Katsuki Bakugou was meant for greatness. He had a powerful quirk, he was smart, and he was talented. And he, who was practically Kami's gift to humanity, would accept nothing less than the top. U.A. Academy of Heroics.
So imagine Katsuki's shock when his head whips back away from the lockers, dazed and with a broken nose.
The hall around the blond was quiet, fellow students staring wide eyed as Izuku held Katsuki by the back of his head. Then, Izuku slammed Katsuki forward again, hearing another satisfying crunch before letting go, Katsuki falling to the ground, holding his bloody face, only for his head to be shoved into an open locker.
Again and again, Izuku slammed the locker door against Katsuki's head until the door itself was warped. He had probably opened a couple wounds on Katsuki's head judging by the red staining his usually yellow hair.
Izuku pulled Katsuki away from the locker, letting him lay on the floor, curled up in pain, only to begin kicking Katsuki in the stomach, his face stretching into a terrifying, toothy grin, made all the more unhinged looking by the blank look in his eyes.
Finally, to add insult to injury, Izuku looked down at Katsuki's hands. The grin grew wider, the green haired boy grabbing one of Katsuki's heads and placing it in the still open locker before slamming the warped metal closed onto the appendage. Katsuki's scream and the crunch of bone as Katsuki's hand was broken was music to Izuku's ears.
He decided to leave the other hand alone. A small mercy for the boy who had made Izuku's life a living hell.
Standing back up from the bully turned victim, Izuku's smile faded, returning to its neutral state of emotionlessness.
He looked around at the stund silent students.
"Someone get the nurse, I think I gave him a concussion" Izuku said, fixing his bag on his back and walking away, leaving the broken Katsuki surrounded by the awed crowd