A member of SIRRUT who is saved by Saya at the start of the film story. She joins the organization to look for her missing father. Although she is a genius hacker, she is afraid to use her ability as she blames herself for what happened to her father. Mana has a sisterly relationship with Tsukiyama and is the one in SIRRUT who fervently tries to get close to Saya as a friend.