Mana Hiiragi is a 17-year old high school student and a member of SIRRUT. She joins the organization in order to search for her missing father, who is a reporter. She is a skilled hacker and helped her father provide information on Seventh Heaven for his job. However, after her father's disappearance, she refuses to hack again until the infiltration at Tsuji Private High School. Ever since Saya saved her from the furukimono at the Tokyo subway, she develops an interest in her and follows her around despite the warnings from her fellow SIRRUT members. At the movie's climax, it is revealed that her father is actually the furukimono that Saya killed at the beginning of the movie. She never learned the truth after Saya disappeared at the end of the movie.