Miu Miu is described by Gwess as giving off air from having come from an upper-class socialite family. She is the corrections captain of Green Dolphin Street Prison and she clashes with Jolyne Cujoh and Emporio Alniño when she comes to stop Jolyne from breaking out of prison. She is a Stand User and uses Jail House Lock to manipulate the memories of her enemies. Jail House Lock is a humanoid Stand capable of making one or several people able to only memorize three new pieces of information at once, the oldest memory being replaced by the newest memory.