Ryu Jose possesses a large, stocky build with a dusky complexion and dark curly hair, reflecting his Latino heritage likely rooted in South America. Originally a test pilot-in-training for the Earth Federation at Side 7, he abruptly enters combat when Zeon assaults the colony. With only simulation experience, he defends the White Base by piloting the FF-X7 Core Fighter during the attack. His mechanical skills also enable him to operate the RX-75 Guntank alongside gunner Hayato Kobayashi. Aboard the White Base, Ryu serves as a vital emotional anchor and mediator, easing friction between the stern commander Bright Noa and young civilian recruits including Amuro Ray and Hayato. He mentors inexperienced crew members in adapting to military life while sustaining morale. His gentle, considerate nature proves essential in resolving conflicts, notably during Amuro’s pilot burnout and desertion. Ryu later advocates for Amuro’s reinstatement to the Gundam, reinforcing his stabilizing presence. During Ramba Ral’s ground assault, Ryu suffers critical abdominal injuries from gunfire. Bedridden in the infirmary, he disregards his wounds during Crowley Hamon’s surprise attack on the White Base. Escaping medical care amid chaos, he commandeers a Core Fighter and intercepts Hamon’s Magella Top tank. Sacrificing himself, he crashes the aircraft into the tank, preventing its destruction of the Gundam and White Base. This act kills both him and Hamon. Ryu’s death triggers profound grief among the crew, forcing them to confront war’s brutality. Amuro and Hayato grapple with guilt and mutual blame. Posthumously, Ryu receives a three-rank promotion to captain for his valor, as depicted in the movie trilogy. Years later, crewmate Job John reflects on Ryu’s mentorship, revealing Ryu dissuaded him from deserting during Amuro’s court-martial. Job John indirectly attributes Ryu’s death to his own decision to relinquish the Core Fighter’s pilot seat that day.