A former Conglomerate employee who absconded and is now plotting to bring down the Conglomerate by exposing its underhanded dealings and experiments. Yuuri introduces Nao to Shinri who promises to help Nao and the others to escape New Akatsuki. Originally Tonosaka's fiancee, she was discarded by him after he devoted his efforts into researching the Baroque phenomenon. She used her skills as a political activist to obtain information on the Conglomerate prior to absconding which she hopes to use as a means to topple it and deprive Tonosaka of his work. She does not care about the welfare of Nao, Yuuri and the other survivors and only sees them as a means to an end. Her ultimate objective is to deprive Tonosaka of his Baroque research and to force him to return to her, preferably with his desire to research focused solely on her alone. She dies in two out of three routes but succeeds in obtaining her ideal revenge in the third route.