Admiral Valsey serves as a high-ranking officer in the Gatlantis Astro Fleet within the *Space Battleship Yamato* remake continuity. Commanding the Seventh Mobile Fleet under Emperor Zworder, he advances the Gatlantis Empire's military interests with an unwavering belief in Gatlantean imperial supremacy, often projecting an arrogant demeanor reflective of imperial ideology. His name likely originates from World War II American Navy admiral William Halsey Jr.

During the *Yamato 2202* narrative, Valsey functions as a fleet commander in Gatlantis's campaign against Earth and its allies. Leading military operations supporting the empire's expansionist agenda, his presence bolsters Gatlantis's hierarchical command structure and underscores loyalty to Emperor Zworder and imperial objectives.