Assigned weapon: Potassium cyanide
A scared girl with high paranoia level
Yuko who witnesses Oki's accidental death and blames Shuya for it, often referring to him as a demon. Later, she joins up with several other girls and hides in an abandoned lighthouse. When the girls find Shuya and bring him in, she poisons his food. The food, however, is instead eaten by Yuka Nakagawa, who quickly dies. The girls soon turn on each other and kill each other in a violent gun fight. Yuko survives this confrontation.
Death: commits suicide by jumping off the lighthouse
