Ryoko Otonashi

Ryoko Otonashi (音無涼子 Otonashi Ryouko) is the protagonist of the Danganronpa/Zero novel series. She is a fake identity of Junko Enoshima and has the title Ultimate Analyst (超高校級の「アナリスト」chō kōkō kyū no “anarisuto”).

Appearance
Ryoko has long, disheveled, dark red hair and eyes and wears the school uniform of Hope's Peak Academy. Her uniform consists of an unbuttoned dark green cardigan on top of a white blouse with a red ribbon. The cardigan has the logo of Hope's Peak Academy emblazoned on it. She wears a short dark green skirt and white knee socks. She also has a melancholic expression most of the time.

Personality
Ryoko is presented as a girl with a psychological disorder which causes her to lose her short and long term memories. Because of this, she writes everything down in a notebook. Due to her illness she often visits Yasuke Matsuda, who she is in love with, for check ups. She is generally cheerful and carefree.

History
In actuality, 'Ryoko Otonashi' is nothing more than a fake identity for Junko Enoshima. Junko, in preparation for the School Life of Mutual Killing, had been testing procedures for memory-erasing with the reluctant assistance of Yasuke. Having succeeded in a particular attempt, she no longer remembered who she was, only having false information in a notebook and the continuing ruse of both Yasuke and Mukuro to go off of.

After Yasuke pretends to be Izuru Kamukura, she starts to remember everything, and kills him in a fit of despair. At this point, “Ryoko Otonashi” dies, and Junko Enoshima continues preparations for the first mutual killing.

Trivia

 * Her first name Ryoko means "Refreshing child" while her last name, Otonashi, means 'no sound'.