Ryoma Nagare serves as a central figure in the Getter Robo franchise, depicted differently across various media. His journey originates in the original manga as a skilled, hot-blooded martial artist. He crashes a karate tournament to avenge his father's dishonored reputation, defeating all competitors and showcasing exceptional combat prowess. This display attracts Professor Saotome, recruiting Ryoma into the Saotome Institute after he kills three assassins sent to test him. Ryoma pilots Getter-1, defending Earth against the Dinosaur Empire alongside teammates Hayato Jin and Musashi Tomoe. Following Musashi Tomoe's death during the Dinosaur Empire's defeat, Ryoma continues as a pilot in *Getter Robo G*. Facing the Hundred Demon Empire in the upgraded Getter Robo G alongside Hayato and new member Benkei Kuruma, his personality remains fiercely aggressive and combat-driven, characterized by relentless determination. He is deeply committed to protecting humanity, though his methods can be brutally pragmatic against dehumanized enemies. In the manga *Shin Getter Robo*, set after *Getter Robo G*, Ryoma experiences visions of a catastrophic future linked to Getter Rays. Distrusting the Getter's evolving power, he abandons piloting for 16 years. He returns in the manga *Getter Robo Go* when Earth faces annihilation, reluctantly piloting Shin Getter Robo. Hardened and more cynical, he acknowledges the necessity of Getter's power for survival. During this time, he mentors new pilot Go Ichimonji while grappling with Getter's destructive potential. The OVA *Getter Robo Armageddon* presents an alternate continuity. Framed for Professor Saotome's murder, Ryoma is imprisoned. After Saotome resurfaces allied with alien Invaders, Ryoma is released to pilot Getter Robo again. Years of betrayal and imprisonment forge him into an anti-hero, fueling a vengeful, distrustful outlook. He initially threatens former ally Hayato Jin and displays ruthlessness against enemies, including those possessing innocent humans. Uncovering the truth behind Saotome's plans rekindles his alliance with the Getter Team. Following a battle against the Invaders in space, he chooses to remain in a time rift to fight for humanity's future alongside Hayato and Benkei. In *Getter Robo Arc*, Ryoma's legacy continues through his son, Takuma Nagare. Having fused with the Shin Getter Robo and departed for Mars years earlier, Ryoma exists as part of the Getter Rays. He appears as a spectral figure to guide the new generation, symbolizing his enduring connection to the Getter's evolution. His absence underscores his sacrifice and commitment to humanity's long-term survival. A consistent throughline depicts Ryoma possessing exceptional martial and piloting skills, strategic ingenuity, and a fiercely protective yet volatile disposition. His character evolves from a vengeful youth to a battle-hardened veteran, embodying the destructive and evolutionary duality of Getter Rays. Relationships with allies like Hayato fluctuate between deep camaraderie and intense friction, especially during betrayals or ideological clashes.