Ranmaru Kageyama was a high school student and one of the 20 original participants of Asu-Naro's Death Game. He died in the First Trial, only to have his personality and memories uploaded into an AI in a lifelike doll of himself called a "dummy". Ranmaru is a casual and easy-going boy. He is generally placid in nature, although occasionally flustered. He seems to come off as nervous or awkward in certain situations. Ranmaru also tries to keep quiet and distant until provoked.