Tsumugi Shirogane

Tsumugi Shirogane (白銀 つむぎ Shirogane Tsumugi) is the hidden main antagonist of Danganronpa V3: Killing Harmony, serving as the ringleader of the killing game. Her talent is the Ultimate/Super High School Level Cosplayer (超高校級の「コスプレイヤー」chō kōkō kyū no “kosupureiyā” lit. Super High School Level Cosplayer). As a cosplayer, Tsumugi is able to mimic the appearance, behavior, voice and characteristics of the person she is cosplaying as. However, she is unable to cosplay as anyone who is existent in reality.

In Chapter 1, Tsumugi murdered Rantaro after discovering that he and Kaede planned to expose her as the Ringleader and Mastermind of the Killing Game. In response, Tsumugi framed Kaede as the murderer of Rantaro. At the near end of the game (Chapter 6), Tsumugi was rightfully revealed as the organizer of the event and is executed alongside Monokuma by Keebo.

Appearance
Tsumugi Shirogane is a slim and tall young woman with blue hair and green eyes. She wears oval-framed glasses and wears a white blouse with a orange bow and a brown skirt. She has black leggings and beige shoes.

Personality

 * In the beginning of the game, Tsumugi is portrayed as a gentle and kind girl who is polite and friendly. This is all made up to be a facade, as she is almost similar to Junko Enoshima. Cruel and cunning, she shows no remorse over organizing the Killing Game and Rantaro's death. Crazy over the Danganronpa show, she went to full lengths to brainwash those who participated int he event. It is evident that she had become insane in the Chapter 6 trial after nobody had voted for the blackened in the trial. Throughout the trial, she cosplayed the characters in Trigger Happy Havoc: Danganronpa and Danganronpa 2: Goodbye Despair as she explained the situartion.

Story
It is believed that like the others, Tsumugi was brainwashed in the Gopher Plan. However, she was involved with Team Danganronpa.