All For One

Sensei is one of the main antagonists of My hero Academia Manga and Anime series. A man with a completely deformed face who was defeated by All Might and founded the League of Villains with Tomura Shigasaki as his successor and the main force of the organization.

Appearance
In the past he appeared as a normal young man with a notable suit and short hair, however his face is still not seen completely.

After his crushing defeat, he appears completely different then before, his face is deformed with a scar on his neck and the assence of two eyes, he also has two tubes connected to his throat which allows him to breath and act as the mind of the organization.

Personality
Until now Sensei showed to be a mysterious and sinister individual, which is able to create complex and elaborate plans in a little matter of time and then order Tomura to fulfill them.

Power and Abilities
In the past he was a very powerful individual who managed to wound All Might and block his One for All ability, his main ability is the opposite of that of his nemesis, which is All for On, this ability allowed him to steal people's Quirks and render them as his own.