Chisato Hashiratani is a second-year male high school student in Group K. He competed in the Friendship Hide-And-Seek game, partnered with Hyakutarou Onigawara to monitor the food station. Their task involved observing Group C participants and reporting any efforts to find Group K's hidden member or deliver food to their own. Assessments label Chisato a "jack of all trades, master of none." He shows above-average ability in many areas but recognizes he cannot excel supremely in any one skill. This leads him to adopt a generally unserious approach to life, sometimes criticizing those who display earnestness or intense dedication. Yet, beneath this, he harbors admiration for such genuinely committed individuals. His personality resembles Makoto Shibe. Chisato handles conversations with females relatively comfortably but maintains heightened wariness around them. During the game, he and Hyakutarou pursued Yuuichi Katagiri and Maria Mizuse after they fled the food station. When Yuuichi pushed Maria down a slope as a diversion, Chisato hesitated before assisting Hyakutarou in rescuing her, aligning with Yuuichi's prediction. Later, under Yuuichi's direction, Maria flirted with Chisato as part of a strategy to provoke Hyakutarou's jealousy. Chisato remained wary of her intentions despite lacking proof of manipulation. His relationship with Hyakutarou Onigawara is significant. Chisato maintains consistent awareness of Hyakutarou, frequently reacting to his actions and statements. He openly admires Hyakutarou's passionate, assertive nature, contrasting it with his own detachment. This dynamic makes it difficult for Chisato to reject sincere requests from Hyakutarou. Individuals like Chisato, who maintain artificial personas, struggle significantly when faced with genuine, unfiltered honesty from others. Chisato himself characterized Hyakutarou as a "tsundere." Physically, Chisato has dark blonde hair and brown eyes. He and Hyakutarou are Group K's fastest runners, though Chisato's movements are predictable and easy to anticipate. Chisato joined his high school's basketball sports club with other Group K members. His surname, Hashiratani, combines the characters for "pillar, post" (柱) and "valley" (谷). His given name, Chisato, means "thousand miles" or "long distance" (千里).