Izuku endured harsh bullying, ridicule, and rejection, ultimately finding himself abandoned on the streets by his mother, who despised his quirk. He had only a handful of people who didn't judge him for his quirk ability.
Quirk Cannibalism: His strength increased with each person he consumed, though it varied based on their size, height, and weight. That was the essence of his quirk.
Izuku wandered the bustling streets of Japan, a mere observer in the crowd. People glanced at him, but he was mostly ignored. His stomach rumbled with hunger as he watched a drunken man stumble into an alley. Intrigued, Izuku followed him, waiting until they were deep enough into the alley to avoid prying eyes.
Suddenly, the inebriated man turned around, slurring his words, "Who are you? Just a brat! I heard your footsteps a mile away, kid!" Undeterred, Izuku stepped forward, picking up a slightly rusted knife from the ground. With determination in his eyes, he charged the man, managing to land a single stab before locking eyes with him. In that brief moment, Izuku was knocked aside, hitting the ground hard.
As the man stumbled around with the knife lodged in his lung, Izuku watched him collapse, slowly succumbing to his wounds. Hunger gnawed at him, and he knew he had to consume to gain strength. He began to eat his grim meal, the sounds of his desperate feast filling the alley. Just then, the sound of approaching footsteps echoed in the alley.
"Whoa, kid, what do you think you're doing?" A stranger with multiple blades approached Izuku. Staring down at the young boy, he introduced himself, "My name is Stain. What's yours...?"