Rose Aproval serves as Secretary General of the United Nations. She shares a long-standing childhood friendship with Kohtaroh Taiga and Geki Hyuuma, evident in her use of the nicknames "Kohtaroh-Bouya" and "Geki-Bouzu" for them. Her direct authorization is mandatory for deploying critical Gutsy Galaxy Guard equipment, including GaoGaiGar's NASA-developed Grand Pressure tool. After GGG's formation, her approval is also technically required for using the Goldion Hammer and Goldion Crusher; however, she delegates this authority via physical keys given initially to Taiga and later to Noriyuki Yaginuma and Swan White, acting as her proxies during field operations.

During the events of GaoGaiGar FINAL, Aproval orchestrates a strategic maneuver to bypass United Nations restrictions preventing GGG from leaving Earth. Collaborating with GGG and allied organizations, she stages an elaborate ploy resulting in the exile of three GGG division ships and their crews from Earth. This action frees them to confront threats in the Tri-Solar System under Ikumi Kaidou's command while avoiding diplomatic consequences for Earth, formally documented as the "GGG Exile Order". Following GGG's departure, she issues a public statement addressing the incident. The draft acknowledges GGG's unilateral action, emphasizes their equipment as "the whole human race’s common property," and underscores the principle of civilian control over powerful entities. Her actions constitute a calculated political strategy, specifically a "Batman Gambit," ensuring GGG's operational freedom beyond Earth's jurisdiction while preempting potential blame or diplomatic fallout for the United Nations.

The character originated in the PlayStation video game *King of Braves GaoGaiGar: Blockaded Numbers* before appearing in the GaoGaiGar FINAL OVA series.