Miss Mother's Day

Miss Mother's Day (ミス・マザーズデー, Misu Mazāzu Dē) is the partner of Mr. 6 and a Frontier Agent in the Baroque Works rankings. She was first mentioned by Nefertari Vivi, who explained how Baroque Works was organized to the Straw Hat Pirates. Neither her nor her partner are seen in the series. Her ranking would mean that she is considerably stronger than the other Frontier Agents.