Leader of a group of junkers on the Shangri-La colony, he became a fan of Axis Zeon since the battle at the Gate of Zedan. Due to his selfish and greedy nature, other junkers such as Judau Ashta did not want to do business with him. Gemon, seeking glory offered his services to Mashymre Cello. Gemon would try on several occasions to destroy the Argama, which was hiding in Shangri-La. However, Gemon's efforts would be stopped by the MSZ-006 Zeta Gundam, piloted by Judau.