Ginro is a supporting character from the anime Dr. Stone: Science Future. He is a sixteen-year-old boy who serves as one of the guards of Ishigami Village alongside his older brother, Kinro. Physically, he is rather short for his age, with a slim build, short blonde hair, and green eyes. His features are somewhat soft and androgynous, a trait that later proves useful for covert operations.

As a personality, Ginro is openly cowardly, lazy, and motivated largely by self-interest. He often complains about physical labor and tries to shirk his duties as a guard, frequently needing to be dragged into work by Kinro or Kohaku. He is easily distracted by shiny objects and boasts a superficial, somewhat perverted side, often dreaming of luxury, harems, and impressing beautiful women. Despite these unheroic traits, Ginro is not without virtue. He is genuinely honest about his fears and regrets his own cowardice. In critical moments, he has shown the ability to overcome his anxiety to protect his friends and family, revealing a hidden reservoir of courage and loyalty.

Ginro’s role in the story is that of a reluctant member of the Kingdom of Science. Initially suspicious of Senku Ishigami, he eventually becomes part of the team, often serving as comic relief or a test subject for Senku’s inventions. His motivations are usually personal rather than heroic; he seeks comfort, safety, and personal gain. However, he is driven by a deep, if often unspoken, desire to be useful and to live up to the example set by his diligent older brother, Kinro. Their relationship is a cornerstone of his character. While Ginro is jealous of Kinro’s golden spear and teases him relentlessly, he holds a deep admiration for his brother and refuses to abandon him in life-threatening situations, proving that family loyalty overrides his natural instinct to flee.

Throughout the series, Ginro experiences notable development. He plays a key role in the dangerous mission to collect sulfuric acid to save Ruri, nearly sacrificing himself to rescue Chrome. During the village tournament, although his selfishness leads him to betray his allies for a chance at power, his defeat serves as a learning experience. On Treasure Island, he initially refuses to join the voyage but is forced aboard, later avoiding mass petrification by sheer luck while diving. He then bravely infiltrates the enemy's harem in disguise to uncover the secrets of the petrification device.

Despite not being the strongest warrior, Ginro possesses notable abilities. He is a competent spearman, having trained as a village guard. He has demonstrated enough physical endurance to defeat other warriors and survive grievous injuries. His most significant abilities are his unexpected resourcefulness and his talent for disguise, which become vital assets for infiltration missions. By the end of the main adventure, Ginro accepts an invitation to become a police officer, though he continues to be defined by his laziness.