Mahiru Koizumi (小泉 真昼), is a student of Hope's Peak Academy's Class 77-B, and a participant of the Killing School Trip featured in Danganronpa 2: Goodbye Despair and its upcoming remake, Danganronpa 2x2.[14] Her title is the Ultimate Photographer (超高校級の「写真家」 lit. Super High School Level Photographer).

She also appears in Danganronpa 3: The End of Hope's Peak High School, which explores her school life leading up to the Killing School Trip and The Tragedy.. and that is this one.

Killing Game AU