Mukuro Ikusaba is a student in Hope's Peak Academy's Class 78th, and a participant of the Killing School Life. She is Junko Enoshima's older fraternal twin sister. Junko influenced and manipulated Mukuro into working towards Junko's desire to "paint the world in despair" and planned to start The Tragedy, which Mukuro was happy to support her. At some point Junko adopted the moniker "The Despair Sisters" for the both of them.