Ken Washio, designated G-1 and known as Ken the Eagle, leads the Science Ninja Team as its tactical expert. Orphaned young, his father vanished under the guise of a fatal plane crash—later exposed as cover for Kentaro Washio's undercover mission against Galactor. His mother succumbed to illness when he was eleven, leading him into Dr. Nambu's guardianship. At thirteen, he commenced training for the Science Ninja Team, undergoing rigorous martial arts instruction that achieved proficiency in judo, karate, kendo, kobudo, aikido, kickboxing, and boxing. In *Gatchaman II*, set two years after the original series, Ken continues spearheading the team against Galactor's resurgence under Gelsadora. The confirmed death of his father—Kentarō sacrificed himself destroying Galactor's V2 missile after revealing his identity—fuels a more intense and occasionally volatile leadership style. This era also marks the return of Joe Asakura (G-2), previously believed dead, who rejoins with cybernetic enhancements. Ken's acceptance of Joe's altered state signals a pragmatic resilience amid ongoing losses. His *Gatchaman II* Bird Style uniform retains its primary white coloration with blue gloves, boots, and a red-lined feathered cape, featuring minor design refinements aligning with updated animation aesthetics. Civilian attire evolves into a two-tone blue shirt marked with a "1" and straight-legged pants, replacing bellbottoms. He pilots the advanced Eagle Sharp fighter jet, replacing his previous aircraft; it boasts weaponry like the Eagle bomber missile and cutting wing nose, integrating into the team's new flagship, the New God Phoenix. Weaponry updates include the Bird Saucer, a collapsible bladed discus replacing the Birdrang boomerang, and the versatile Shock Gun. He later wields the Gatchaman Fencer, an electrified beam sword capable of slicing steel. Core Science Ninja Techniques persist, including the disorienting Bird Flash and holographic duplicate-creating Kage No Bunshin. Interpersonally, Ken navigates complex team dynamics. His relationship with Joe evolves from rivalry into deep mutual respect, though operational clashes endure. Romantic tension with Jun (G-3) culminates in a committed partnership by the series' end. He exhibits financial irresponsibility, habitually deferring payments at Jun's snack bar and relying on Jinpei (G-4) for assistance. While generally calm, crises periodically disrupt his demeanor, requiring team support to regain focus. Alternate portrayals diverge significantly: the OVA depicts Ken as a veteran pilot from the War of Marseilles ("The Star of Africa") who inherits his father's airfield and book collection. His Bird Style shifts to a blue bodysuit with white accents, omitting the "G" belt. Concept art for the cancelled Imagi film project proposed armored suits inspired by either the 2000 NTT design or OVA aesthetics. *Infini-T Force* presents a twenty-four-year-old Ken with grey hair and stubble, surviving alone in a dystopian world where Galactor killed his team. This version wields a sword inherited from his father and exhibits a more world-weary disposition.