Natsumi Tsuji (辻菜摘, Tsuji Natsumi), previously identified only as "Girl A" and later as Nevada-tan, is a former Japanese high school student who became known in Japan and around the world after murdering her classmate Satomi Mitarai (御手洗 怜美, Mitarai Satomi) on July 1, 2004. The crime shocked the Japanese and international public with its details. The motive for the crime was reportedly comments Mitarai had made about Tsuji's appearance online. In 2025, she joined the Supergroups ISG after escaping from prison due to her lack of remorse and finding happiness in murder. She tested at about 140, an IQ held by only about 0.5% of the population.