Life isn't fair. Midoriya learned that very young when a Quirk didn't manifest in him, and everyone thought less of him for the way he was born. A hero looks at an unfair world and protects people from it. Midoriya does this without even thinking, an urgency in him as necessary as breathing.

He makes a sound like a dying animal. "No..." he manages, pressing his lips together. Why this?! He's never going to live down the slime incident.

"I don't want people to find out where I live," he explains after swallowing the bit of cereal he nearly choked on, "or who I'm friends with. I've been thinking... that I should be more careful. I don't have my school or Pro Heroes or even the police to help. A villain could attack my friends. I can't let that happen."