TV-Series
Description
General Oka, alternately known as Commander Robinson in regional adaptations, commands the Earth Defense Force and co-designed the super-electromagnetic robot Voltes V alongside scientists Professor Kentaro Goh and Professor Hamaguchi. He directly oversees the Voltes Team's defense against Boazanian invaders.

Enforcing strict military discipline, Oka demands unwavering obedience from subordinates. This rigidity surfaces when he reprimands his daughter Megumi Oka (Jamie Robinson) in episode 9: despite her saving his life and thwarting a missile attack, he slaps her, cites battlefield deserters' executions, and confines her to a medical room for four days. His inflexibility further manifests in harsh command treatment and initial endorsement of morally questionable tactics like forcibly recruiting Ippei Mine into the Voltes Team.

Oka conceals a terminal illness from the Voltes Team, likely refusing medical aid over security risks or combat-readiness concerns. This secrecy complicates his character.

His arc culminates in episode 31. After freeing Megumi/Jamie from a Boazanian ring's mind control, he sacrifices himself by holding off enemies so she can escape and rejoin her team to form Voltes V. This act ensures the team's survival and atones for his prior rigid discipline. Earlier, he hangs up on Megumi when she teases his weight, but later begs forgiveness while preparing to shoot the controlling ring off her hand, choosing this extreme measure before physical removal.

In the live-action *Voltes V: Legacy*, renamed Oscar Robinson, he is Jamie Robinson's father and trained her in ninjutsu since childhood. Resigning from the Earth Defense Force to create positive memories with Jamie, he reveals his wish that she avoid piloting due to its dangers. His resignation stems from terminal cancer, hidden until after his death. Oslak orchestrates an attack using mind control via a ring to force Jamie to assault Oscar. After Oslak shoots him, Oscar leaves Jamie a letter expressing pride.

Thematically, Oka embodies war's corrupting pressures, showcasing how conflict drives defenders toward morally grey methods. His death catalyzes Dr. Sakonji's (Dr. Hook) development beyond similar rigidity.