Shin Tsukimi is using his old friends name and personality, Sou Hiyori. He acts standoffish, secretive, and distrustful of others. He will do anything to survive, and creates clever schemes to manipulate others. He is very intelligent. He was kidnapped to participate in the Death Game with others. Shin has a 0% survival rate, which caused him to adopt Sou's name and personality. Sou is a sadistic and malicious man, so Shin acts like that as well.