Kiri Marialate, from New Zealand, enlisted in the military at eighteen to gain the strength needed to protect vulnerable people. She possesses formal martial arts training as her notable special ability, with insects documented as a weakness. Assigned as a probationary pilot cadet to the space station Watcher's Nest, she displayed a steadier demeanor and stronger sense of humor compared to fellow cadets Misaki Kureha, Luxandra Frail, and Suzanna Bluestein, while wearing a standard orange uniform. Prior to the events of Misaki Chronicles, Kiri experienced professional jealousy when Suzanna Bluestein was initially chosen as the replacement squadron commander candidate ahead of her. She shared this reaction with Luxandra Frail, and both later acknowledged these feelings while processing Suzanna's subsequent decision to leave military service and undergo memory erasure. Following temporal disruptions at Watcher's Nest, Kiri's responsibilities grew significantly. She assumed command of Ghoul investigation missions after Lyar von Ertiana became incapacitated from excessive time barrier travel. Alongside Lyar, she actively attempted to dissuade Misaki Kureha from manipulating past events to prevent Luxandra's death and Suzanna's departure, recognizing the dangers of temporal interference. Kiri participated in critical operations across various historical periods in Japan, including confronting Ghoul manifestations and discovering Misaki's direct involvement in the anomalies during a 1936 coup attempt. Her character development culminated during a mission inside alien ruins, where she deliberately intercepted a Ghoul's energy blast meant for Misaki. This act of self-sacrifice resulted in her death, underscoring her commitment to protecting others. Physical descriptions consistently note her height as 165 cm with an athletic build, measurements of 89-54-85, and the continued use of her orange uniform. Her role evolved from a supporting cadet to an essential team member undertaking greater responsibilities before her sacrifice.