Sugar is a special officer of the Donquixote Pirates' Trebol Army. She was one of the most integral components of Doflamingo's plan in keeping Dressrosa in line, as any dissenters were turned into toys by her Hobi Hobi no Mi powers. She is also the younger sister of Monet. Due to her actions and role, she is a supporting antagonist during the Dressrosa Arc. (Source: One Piece Wikia)