Goro Shirogane leads the four-member Ginguiser Team, piloting the Grand Fighter component of the combined robot Ginguiser. His blue eyes often convey an innocent and fearless demeanor.

Over a decade before the main events, Dr. Godo rescued Goro from a deadly plane crash. This forged a deep sense of indebtedness, driving Goro's commitment to repay Dr. Godo by defending Earth. Dr. Godo taught him the essential "point barrier" magic technique for controlling Ginguiser.

Goro maintains a double life: publicly, he performs as a stage magician in a traveling amusement park and circus show alongside his teammates, hosting magic shows and leveraging his genuine supernatural abilities. Privately, he uses these real magical powers to combat alien invasions.

As the team's Ace Pilot and Leader, Goro coordinates both stage performances and battlefield operations against the Sazorian Empire. He is associated with the color red in the team's uniforms and the spade (♠) symbol in their playing card motifs. Their robots project massive playing cards during combat, with Goro's attacks frequently themed around spades.

Within the team, he manages dynamics including friction with the sole female member, Miki Akitsu, who displays a critical attitude despite their cooperation, the immaturity of Zanta Minami, and the reliability of Torajiro Aranami.

Goro's combat style blends magical skills with mecha piloting. He utilizes specific attacks from the Grand Fighter: Magic Card (spade-shaped projectiles), Magic Ring (laser restraints), Magic Sword, and Magic Laser emitted from the chest emblem. These powers contribute to Ginguiser's broader arsenal, including the combined robot's Paranormal Smash ram attack.