Do-S is a Demon-level Mysterious Being and a member of the Monster Association. Do-S resembles a tall human female with long blonde hair, a curvy physique, pink eyes with black sclera. Do-S' outfit is a revealing BDSM ensemble made of tight black straps on bare body that barely cover her nude body. Do-S embodies the traits of a sadistic dominatrix and princess. Do-S possesses the ability to control the minds of others to love her by hitting them with her whip, turn them into masochist.