Ann is a young woman with very curly light green hair which is mostly partitioned into two sections and purple eyes (light brown in One Piece live attraction artwork), and had freckles on her face. She wears a frilly white top with green sleeves that exposes her midriff, and has a necktie whose design is based off of Tokyo Tower. She wears a large skirt with green and white stripes that has a large amount of black frills lining the bottom, and wears green tights as well as green heels. She wears two bows, both of which are orange on the right side and have yellow and green stripes on the left. One bow is on the top of her head, while the other is on the back of her skirt.
Ann is a kind but ditzy girl. She quickly made friends with the Straw Hat Pirates, and she also is thoughtful enough to have asked Luffy if he wanted to see Ace again. However, she often forgets that she has created illusions when she interacts with them.
Ann met the Straw Hat Pirates, except for Robin, Franky, and Brook, on an island, and she became friends with them. However, she was then captured by Buggy and Puggy and was forced to create several illusions of people the Straw Hats knew, putting them against the Straw Hats. The Straw Hats were captured, but they managed to defeat Buggy and Puggy and free Ann. Ann thanked them and offered to show Luffy an illusion of Ace, but Luffy declined.