Ryoma Nagare, known as Ryo, begins as a martial artist determined to avenge his father's dishonored karate dojo. He achieves this by storming a national tournament and defeating all opponents with his brutal fighting style and exceptional physical skill. This feat draws the attention of Dr. Saotome, who recruits Ryoma after he survives an assassination attempt by three thugs while suffering a severe tendon injury, demonstrating his combat resilience and mental toughness. Initially defined by hot-blooded aggression and a love of battle, Ryoma possesses a strong sense of justice, fiercely opposing adversaries like the Dinosaur Empire for their inhumane experiments. He forms profound bonds with his Getter Team comrades, deeply mourning Musashi Tomoe's sacrifice against the Dinosaur Empire. Exposure to Getter Rays and visions of a catastrophic future cause him to question the energy's dangers, leading to periods of reluctance in piloting Getter machines, though he ultimately acknowledges their necessity against dire threats. In *Getter Robo G*, Ryoma continues as a pilot following Musashi's death, now operating the Getter Dragon alongside Hayato Jin and the new third pilot, Benkei Kuruma. The team battles the Clan of the 100 Demons (Hyakki Empire), with Ryoma remaining a primary combatant. His leadership and tactical adaptability stay crucial, though vengeful tendencies emerge against enemies threatening humanity. The *Armageddon* OVA portrays a darker period: framed for Dr. Saotome's murder and imprisoned, Ryoma becomes consumed by bitterness, especially towards Hayato, who testified against him. Released to assassinate the resurrected Saotome, he initially seeks revenge but refocuses on eliminating the alien Invaders, displaying ruthless pragmatism—such as destroying an Invader absorbed with pleading humans—until comrades intervene. After vanishing during a failed mission, he returns 13 years later piloting the customized Black Getter, eventually reconciling with Hayato to confront greater threats. In later continuities like *Shin Getter Robo* and *Getter Robo Go*, Ryoma temporarily abandons piloting after traumatic events, including torture by the Dinosaur Empire and Musashi's death. He wanders as a martial artist but returns to pilot Shin Getter when humanity faces extinction-level threats. His final arc culminates in *Getter Robo Arc*, where he merges with Shin Getter-1 during a battle against the Andromeda Stellaration, becoming one with Getter Rays and departing Earth for Mars. His legacy endures through his son, Takuma Nagare, who inherits his role as a Getter pilot. Ryoma's abilities include mastery of his family's pragmatic karate, enabling him to defeat enhanced opponents barehanded. As a pilot, he exhibits innate proficiency with all Getter configurations, swiftly adapting to controls and devising strategies like the Getter Beam or Final Dynamic Special. He wields a high-caliber handgun and demonstrates engineering skill by modifying the original Getter into the Black Getter. His resilience allows him to fight through severe injuries, amplified by his connection to Getter Rays.