Voiced by: Yuko Sanpei (Japanese), Johnny Yong Bosch (English)
Renton Thurston (レントン・サーストン, Renton Sāsuton) is the son of the late military hero Adroc Thurston and co-pilot of the Nirvash typeZERO. He is a very outgoing and emotional person possessing strong ideals and compassion yet is naive and tends to jump into matters before understanding what's going on. Before joining Gekkostate, he lived with his grandfather Axel Thurston in Bellforest, attending school and learning to be a mechanic in Axel's shop. He was heavily influenced by his sister Diane Thurston and believes that he will see her again one day. Though somewhat of a celebrity, being the son of a savior, Renton feels uncomfortable being the son of Adroc Thurston. His surname is recognized everywhere he travels, and he constantly feels as if he lives in his father's shadow. Renton believed Adroc was a poor father and abandoned his family for his research.
After the Nirvash accidentally crashed into Renton's room next to Axel's garage, Renton met Eureka and fell in love with her at first sight. Renton's unusual link with Nirvash and responsibility over his father's Amita drive motivated him to join Gekkostate. He came to Gekkostate to follow Holland, his idol, and to be with Eureka, with whom he fell in love and swore to protect. His time with Gekkostate had been a difficult transition as he was subject to many pranks from crew members (especially Eureka's adopted children). He eventually comes to learn of the origin of Gekkostate and the atrocities that Holland and Eureka and others are atoning for. Renton stayed with Gekkostate to train and in time his skill as an LFO pilot developed on par or above Eureka. That development affected a rift with Eureka as he desires her to return his love for her. His love for Eureka is not secret; everyone on board Gekko interferes in his love life. The crew members constantly want to know his progress and cheer him on. His relationship with both Nirvash and Eureka develops into a deep emotional and mental link that is noticed by Mischa.
Renton has a special link with the Nirvash along with Eureka. Usually, both he and Eureka are necessary to activate the Amita drive, awakening Nirvash and allowing access to the power responsible for the Seven Swell phenomenon. Specifically, when Renton and Eureka achieve emotional agreement and wish for something, Nirvash reciprocates with the power of the Amita drive. If their feelings are in disconnect, the Amita drive cannot activate. However, there are some occasions where Eureka is present yet unconscious, and Renton alone convinces Nirvash to awaken. Renton summons the powers of Amita drive several times throughout the series. His very first time was triggered by an overwhelming need to protect Eureka during his delivery of the Amita drive to Nirvash and Gekkostate, resulting in the second Seven Swell phenomenon ever (the first being Adroc's disastrous experiment with Eureka).