Mike Miller is a guest character who appears in a single episode of the original Science Ninja Team Gatchaman series. He is introduced after being released from prison following a thirty-five-year sentence. No one comes to welcome him, as so much time has passed that his family is no longer present. Miller was once a highly skilled marksman, but his tendency to goof off and neglect his serious responsibilities led to his capture and imprisonment. Despite being out of practice, he is recruited by the villainous organization Galactor and given a small tank equipped with a freezing ray gun. His mission is to eliminate the Science Ninja Team. Miller’s motivations stem from his newly regained freedom and the opportunity to use his old abilities, though his careless nature remains a defining trait. He does not form any lasting relationships with the main cast, as his role is limited to that of a one-time adversary. His development is minimal, as he appears only in a single storyline and does not undergo significant change. His notable ability is his former marksmanship, though his time in prison has diminished his edge, and his personality makes him an unreliable operative.