Natsumi Kuzuryu is the secondary overarching posthumous antagonist of Chapter 2 of Super Danganronpa 2: Goodbye Despair, and a major character in Danganronpa 3: The End of Hope's Peak High School. She is also a pivotal antagonist of the franchise, triggering Izuru's existence. She is self-proclaimed as the Super High School Level Little Sister, but in reality does not have a talent. This makes her envious of her brother, Fuyuhiko, and she desperately desires to be with him as his support.