Ken Washio, designated G-1 and codenamed Ken the Eagle, leads the Science Ninja Team as its primary tactician. His father, Kentaro Washio, vanished during Ken's childhood, leading Ken to believe he perished in a plane crash. Ken became a full orphan at age 11 after his mother died from illness; Dr. Nambu then took him in. Gatchaman training began at age 13, concurrent with Ken working as an aircraft test pilot and air mail operator while living in his father's former airfield office. His personality exhibits calmness and strategic thinking, though he displays emotional vulnerability in crises, relying on team support. Frugality leads him to frequently neglect paying at Snack Jun, depending on teammate Jinpei for financial help. An avid reader, Ken inherited his father's book collection and mastered multiple martial arts, holding ranks in judo, karate, kendo, kobudo, aikido, kickboxing, and boxing. Although popular with women, including teammate Jun, Ken struggles with emotional expression and generally avoids romance due to mission focus. Post-mission, he aspires to become an ISO officer. Character development reveals his father faked death to infiltrate Galactor, operating as the Red Impulse commander. They reunited in episode 53 just as Red Impulse sacrificed himself destroying Galactor's V2 missile, plunging Ken into depression before he regained resolve. This loss was later exploited by Gel Sadra in "Gatchaman II" via impersonation. Key relationships include Joe Asakura (G-2), his second-in-command; their clashes stem from differing approaches, yet mutual respect forms a bond rooted in their shared upbringing under Dr. Nambu. He respects Jun (G-3) professionally, remaining largely unaware of her romantic feelings until developing ambiguous "stronger than friendship" emotions by the end of "Gatchaman Fighter". Adaptations present variations: The 1994 OVA features Ken with short hair, a military background as "The Star of Africa" in the War of Marseilles, and a redesigned Bird Style costume primarily blue without the "G" belt emblem; his civilian attire became a hoodie and jeans. Infini-T Force depicts Ken at age 24 with grey hair and stubble, surviving a six-year war against Galactor. Transported to another dimension where his team perished and Dr. Nambu turned antagonist, Ken witnessed Joe's death during their confrontation with this corrupted Nambu. Choosing to remain as that world's sole protector, he fights on in memory of his fallen comrades. The cancelled Imagi film project featured conceptual Bird Style designs fluctuating between armored aesthetics inspired by NTT commercials (2000) and OVA elements, eventually settling on original-series-inspired suits with visible seams; civilian attire included flight school-inspired uniforms. NTT commercial live-action versions featured SMAP member Masahiro Nakai portraying Ken within factional Tokyo warfare narratives. Abilities encompass Science Ninja Technique martial arts enabling avian-inspired maneuvers, signature weapons like the rocket-enhanced Birdrang boomerang and feather shuriken, and expert piloting. His vehicle transforms from a light jet into the G-1 fighter, docking with the God Phoenix mothership. As tactical leader, he coordinates the team's combined Tornado Fighter attack.