TV-Series
Description
Hiyoshi Gou, the youngest of the Gou brothers, possesses brown hair and freckles, typically clad in a light green uniform bearing a yellow "V" insignia. His early life was defined by the absence of his father, Kentaro Gou, who vanished during a diplomatic mission to Boazania when Hiyoshi was very young, contributing to teammates sometimes viewing him as naive despite his capabilities.

From a young age, Hiyoshi demonstrated advanced aptitude in mechanics, robotics, and electromagnetism, gaining recognition from university professors as a prodigy. This expertise secured his role in the Voltes V team as pilot of the Volt Frigate—forming the robot's legs—and as field technician handling repairs. His inventions include Tako-chan, an octopus-shaped assistant robot initially dismissed by teammates but later proving vital on missions.

Hiyoshi's personality blends cheerfulness with resilience. Early on, he occasionally prioritized personal interests like boat racing over duties, causing friction with his older brother Kenichi. He matured significantly through challenges, notably voluntarily dismantling Tako-chan to repair critical equipment, showcasing his growing commitment to team objectives. His non-combat skills encompass swimming and diving, enabling him to navigate deep-sea environments and confront threats such as sharks.

The Boazanian invasion of Earth propelled Hiyoshi into action with Voltes V. Alongside brothers Kenichi and Daijiro, plus teammates Ippei Mine and Megumi Oka, he defended Earth under the guidance of his mother, Mitsuyo Gou, and Professor Hamaguchi. His mother's death during a Boazanian attack deepened his resolve, strengthening his dedication to the team's mission and the search for his father.

Hiyoshi's development focused on overcoming perceptions of childishness. His technical innovations, including refinements to Voltes V's systems, gradually earned him greater team respect and trust. His familial bonds, especially with his brothers and the unresolved quest to find his father, remained a driving force throughout the conflict against Boazania.