Sadie-chan is a character from the anime and manga series One Piece. She is a warden at Impel Down, the infamous underwater prison. Known for her sadistic nature, Sadie-chan takes great pleasure in torturing prisoners and holds a commanding position over the jail's guards. She is often accompanied by her devilish whip, which she uses with precision and zeal. Her flamboyant personality and distinctive red attire make her stand out among the prison staff. Sadie-chan plays a significant role during the Impel Down arc, where she opposes the protagonists as they attempt to break out of the prison.