midnight (boku no hero academia)

Boku no Hero Academia character.

A 31-year-old pro hero dubbed the "18+ only Heroine". She has long spiky hair, a mole underneath her eye, and is frequently seen holding a cat o' nine tails. Her hero costume consists of a breastless dominatrix-like leotard, thighhighs with garter straps connected to a belt along with high heel boots, cuffs, and a domino mask.

Her quirk is being able to give off sleeping gas from her body which requires her to expose a considerable amount of skin, causing her to wear an extremely tight bodysuit underneath her clothes (though it is implied that she didn't always wear this).

Her real name is Kayama Nemuri.