Renton Thurston is the main protagonist of the anime series 'Koukyoushihen Eureka Seven.' A young boy with a passion for lifting and a deep admiration for the legendary pilot Holland, Renton embarks on a journey that changes his life forever when he meets the enigmatic girl Eureka. Renton is initially naive and somewhat immature, but throughout the series, he develops into a courageous and determined individual. His relationship with Eureka becomes a central focus of the story, driving much of the emotional and narrative arcs in the series.