Ain is a fictional character from One Piece Film: Z, serving as one of the primary antagonists and a loyal former Marine under the command of Zephyr (Z). She is a skilled fighter and the user of the Modo Modo no Mi, a Devil Fruit that lets her reverse the age of anything she touches by 12 years. In the film, she plays an important supporting villain role, helping Zephyr carry out his plan to destroy the New World’s pirate strongholds.