Somnambulist

Somnambulist (眠り香) is a Quirk used by Nemuri Kayama, better known as Midnight.

Quirk Description
Midnight's Quirk allows her to put targets to sleep by exuding a sleep-inducing aroma from her body. The aroma is described as being more effective on males than females.

It's possible to avoid the aroma by simply not smelling or breathing it in.