Izuki snaps at the USJ and it brings disastrous consequences, especially because she was always fragile to begin with...Nobody truly knew Izuki Midoriya, not a soul. She mostly kept to herself but that just seemed to keep the spotlight on the poor girl.
After being diagnosed as quirkless her only friend Katsuki Bakugou became her primary source of torment.
It started off with mild shoving but quickly escalated into major bruising, cuts and burns thanks to Bakugou's quirk explosion.
A year later after Bakugou threatened to tear her throat out Izuki stopped talking and lived life on autopilot.
After discussing it with a therapist Izuki was moved to a school that trained the quirkless to defend themselves.
Midway through the training Izuki developed a quirk that was written off as so mundane she may as well still have been quirkless.
Her right arm turned completely black And because of her being the only quirked kid she was outcasted once more.
The course finished when Izuki turned twelve. Although it didn't stop there. Her training was rented out to hero agencies for espionage and due to that fact she was offered a place at UA when she became fifteen.
During the physical entrance exam her quirk evolved and as ironic as it sounded a flash of darkness enveloped the rest of the faux villains.
This earned Izuki more than enough combat points but she was never focused on that. No, the girl focused on rescuing as many as she could with as little conflict as possible.
And so with the combined total of combat and rescue points she scored a world breaking two hundred and eleven points.
And that brought us to the current situation...
"SHITTY FUCKING DEKU!"