Gyuma is a central figure in the basketball world of Buzzer Beater, recognized as the most talented and renowned player in the universe. He is a 19-year-old male belonging to the Goran, the alien species that dominates the sport. His position is with the Bulls, a team in the Space League, which represents the highest level of professional basketball. The story establishes him as the player considered to be the closest successor to the legendary Jordan, a figure who had long dominated the league before announcing his retirement. Gyuma's very existence is the primary benchmark against which all other players, particularly the human team, measure their success.

As a Goran, Gyuma possesses the physical and skill-based advantages typical of the alien players who have taken over the sport. His reputation as the best basketball player in the universe is not merely an opinion but a widely accepted fact within the world of the series. This status defines his role in the narrative: he is the ultimate goal, the final obstacle that the protagonist Hideyoshi and his all-human team must overcome to prove that humans can be number one in basketball. The old man Yoshimune, who believes in human potential, specifically aims to build a team that can reach the top, with Gyuma representing that pinnacle. In this sense, Gyuma serves as the story's primary rival and symbol of the established alien-dominated order.

Regarding his personality and motivations, direct information is limited. However, one notable character detail reveals a psychological vulnerability. Gyuma suffers from a trauma that makes him physically ill at the mere mention of a player named Abiru, specifically having been pushed down by this individual at some point. This unusual fear suggests that beneath his supreme confidence and skill, he has a hidden weakness that could potentially be exploited, adding a layer of complexity to his role as an invincible champion. His primary motivation within the story's framework is implicitly to maintain his position at the top of the sport, though his internal drives are not extensively explored.

In terms of key relationships, Gyuma's most significant connection is to the legendary player Jordan, whose shadow he is poised to step out of. The narrative also positions him as the target for the human protagonist, Hideyoshi, whose self-confidence drives him to seek out and challenge Gyuma directly. The specific enmity with Abiru, which causes Gyuma such distress, is another relationship that defines a part of his character. Throughout the story, Gyuma does not undergo a significant personal development arc; his function remains largely static as the measuring stick for the human team's growth. His notable abilities, while not cataloged in detail, are implied to be unparalleled. He is the benchmark of excellence in the Space League, and the entire plot is structured around the goal of a human team finally being able to compete with and defeat a player of his caliber.