 When the girls all became paranoid and panicked, Satomi Noda grabbed the uzi, and when Chisato moved to get Yuka's gun, Satomi shot her three times in the back.In the manga, after Satomi begins accusing Chisato of poisoning the food, Chisato becomes increasingly paranoid, believing that everyone is going to side with Satomi.Chisato grabs Yuka's gun, thinking that the others will have to listen to her if she has it, however, when she points it at Satomi, Satomi responds by shooting Chisato in the stomach with the machine gun, killing her instantly.