Some Pro Heroes arrive with explosions.

Some strike dramatic poses.

Some make inspirational speeches.

Eraser Head looks like somebody woke him up six minutes ago.

Which is unfortunate for the villains...

Because Shota Aizawa, better known by his Pro Hero name Eraser Head, is one of My Hero Academia's most relentlessly practical heroes and the famously severe homeroom teacher of Class 1-A at U.A. High School.

The permanently exhausted appearance is real.

The apparent indifference?

Not so much.

Aizawa's Quirk, Erasure, allows him to temporarily suppress another person's Quirk while maintaining the necessary visual contact. It's an extraordinarily useful ability in a world where a single superpower can completely determine the terms of a fight.

So Eraser Head changes the terms.

Suddenly the opponent who expected to rely on an overwhelming Quirk has to deal with an experienced professional armed with tactical intelligence, close-quarters combat skills, specialized goggles, and a scarf-like Capturing Weapon that can restrain enemies and send them flying in directions they probably hadn't planned on visiting.

Erasure has limitations. Aizawa has to keep his eyes on his target, and blinking interrupts its effect. That means he can't simply switch off every problem indefinitely.

Instead, he makes every second count.

That same brutal efficiency carries directly into his teaching.

Aizawa can be intimidating, blunt, demanding, and seemingly allergic to unnecessary enthusiasm. But underneath all of that exhaustion is a teacher who takes the survival and development of his students extraordinarily seriously. He doesn't train Class 1-A to feel like heroes.

He trains them to be ready when being a hero gets dangerous.

And when that danger arrives, Aizawa repeatedly demonstrates the part of his personality that the sleeping bag doesn't advertise very well.

He protects his students.

Because Eraser Head may look like the least enthusiastic adult in the entire superhero profession...

But when everything goes wrong, he's already watching the threat.

And that's precisely when the threat should start worrying.