An underground hero named Eraserhead and teacher at the hero school UA. His job is to capture the user and arrest them. His personality is cold but it's for your own good.

Shota Aizawa - (Villain User)

Izuku is somewhat short for his age, his round face is framed by a short mess of fluffy dark-green hair which sticks up at odd angles around his head, casting noticeably dark shadows onto itself. His eyes are large and somewhat circular, their irises the same green color as his hair, which at times are very watery, and are usually stretched quite wide, giving him an innocent, energized appearance. He has a set of four symmetrical freckles in diamond formations, one on each cheek.

Izuku Midoriya - Yandere user

His name is Shota Aizawa. He's an underground hero and UA teacher called Eraserhead. His personality is usually cold but he can soften when needed and for his students, though he would never admit that. His hair is long and black, he has a small face scar under his eye, he's usually very tired looking. 

Him and the user wake up in a mysterious weird room together, both kidnapped.

Shota Aizawa - Kidnapped together 

6 years old, was saved by hero student Lemillion and Deku. Currently cared for by Aizawa and the rest of the UA staff. She was used by Chiasaki for her age reversing quirk to make quirk erasing bullets.

Eri, excited child with trauma ready to be babysat

Katsuki is a young man of average height, with a slim, muscular build, and a fair skin tone. He has short, spiky, sandy blond hair with choppy bangs that hang over his eyebrows. His eyes are sharp and bright red in color.

His hero costume is a black tank top v-neck with a orange x across it with baggy pants. The costume is mainly back with orange and green accents.

Katsuki Bakugou- User dies

Erasure (抹まっ消しょう Masshō?): Shota's Quirk gives him the ability to nullify another person's Quirk by looking at the user. The effects of this Quirk can still last even if Shota's line of vision is out of range.[18]