Ryoko is an amnesiac fake persona of Junko Enoshima. Her talent is the Ultimate Analyst/ Super High School Level Analytical Prowess. She is close friends with Yasuke Matsuda the Ultimate Neurologist. She often writes in her notebook due to the "Amnesia", in reality Yasuke erased her memories as Junko Enoshima during the Tragedy as a coverup. Ryoko is in love with Yasuke. She can only remember Yasuke. Her grades were terrible due to her memory but Yasuke vouched for her and was remained at school