Aigis is an android created by the Kirijo Group. She is the last surviving model of their experimental anti-Shadow weapon. In combat, she uses a wide variety of high-tech weapons, from machine guns and rocket launchers to long-range guns and “rocket punches.” Aigis is introduced during SEES' summer beach vacation, where she is simultaneously the target of Mitsuru's retrieval mission and Junpei's "Operation Babe Hunt." She immediately shows an instinctual interest in protecting the protagonist (in the story, it is Makoto), which she cannot explain. Ikutsuki decides to make her a member of SEES and she later enrolls at Gekkoukan High School.