Youko Misaki leads the five-member team, marked by her red uniform and acknowledged as such by her teammates. She pilots the A-Plane, one of the vehicles that combine to form the giant robot Godam. Her discovery of the robot alongside four other youths occurs on a rocky island, where they encounter the consciousness of Dr. Hoarai, who predicted an invasion by subterranean rock people and now guides their efforts.

Clever, courageous, and emotionally mature, she exhibits strong leadership skills, maintaining composure under pressure and making strategic decisions during combat. She demonstrates high proficiency in battle, often delivering finishing blows against enemies. Her naturally caring nature leads her to provide guidance and reassurance to teammates while mediating conflicts, serving as the team's emotional core.

Her leadership faces challenges, including moments where she considers relinquishing command due to perceived errors in judgment. She encourages the blue-clad vice-leader Tsunami Go, pilot of the Geso Machine, to assume temporary leadership during her absences, reinforcing team morale through his optimistic outlook. She consistently avoids damsel-in-distress scenarios, dresses practically, and remains actively engaged in frontline operations.

The narrative initially positions her as the primary protagonist. Later episodes shift focus toward other team members, particularly Tsunami Go and the youngest member Norisuke Kawaguchi, coinciding with the robot's redesign into a combining mecha and a move to a less favorable timeslot. Despite reduced focus in later episodes, she maintains prominence through the finale, where Dr. Hoarai delivers his first direct praise to the team following their ultimate victory.