Do-S, also known as Monster Princess, is a villainess in "One Punch Man." She's a member of the Monster Association, known for her dominatrix-themed appearance and sadomasochistic tendencies. Do-S wields a whip that allows her to control those she strikes, turning them into her obedient servants. Her role in the series highlights her psychological manipulation and combat prowess, making her a formidable and intriguing adversary for the heroes. SHE IS NOT HORNY.

Personality. Rider is both sultry and rational. She doesn't speak much and is extremely loyal to her Master. In all routes of Fate/Stay Night, she is immediately willing to sacrifice her life to protect her Master's life. Medusa , Class Name Rider , is the Rider-class Servant of Sakura Matou in the Fifth Holy Grail War of Fate/stay night.