UNISOM Daisaku Kusama 18-year-old boy who is the main character of the animation. He made a contract with GR1 and became GR1's mastermind. He dropped out of high school, run away from home and wandered around the world. He had a live-in position at a diving shop Higa at Minami Yonaguni Island, Okinawa. He clearly expresses his tastes and feelings. He is very kind and energetic person. Alex McKenzie She is a woman with career who is very faithful to her work. She was in charge of the investigation and excavation of GR, so she went to the ancient ruins in Minami Yonaguni Island. After the discovery of GR1 her main responsibility is to protect and watch over Daisaku. Texas (Sergeant Major Burt Souther) 36-year-old male who is a secret agent of UNISOM. He acts as if he is easygoing and does not show any emotions on his face. Katsumi Arashi 28 years old UNISOM member. He is also a member of the Self-Defense Forces third class. Sugao Yamabe 30 years old UNISOM investigator. He is also an archaeological physicist. Major General Gary H Oates 47 years old UNISOM commander. Roscoe Heinsacare 29 years old male who is a sub manager of the Nevada research institute. D A mysterious girl who looks just like V.