Born into Ishigami Village as a descendant of the original astronaut team that survived global petrification, Ginro serves alongside his older brother Kinro as village guards enforcing strict policies against outsiders. Known for impulsiveness and less discipline than his brother, he often prioritizes personal gains, such as demanding a gold-coated spear after witnessing others receive bribes. Despite his fearfulness, Ginro displays unexpected bravery during critical moments. Tasked with collecting sulfuric acid for Ruri’s cure, he initially panics under lethal threats but later conquers his terror to rescue Chrome from a toxic spring, spurred by Kaseki’s counsel that fear can be overcome for a greater cause. Overconfidence drives him during the Village Games tournament, where he consumes raw herbs to boost performance, achieving fleeting success before collapsing from recklessness. Temporarily swayed by selfish ambition, he challenges Senku’s leadership to seize power but swiftly rejoins the group after his plot fails. Confronted by Hyoga’s invasion, Ginro defies orders to cut a bridge that would endanger Kinro, choosing his brother’s survival over strategic demands. This loyalty culminates when both brothers accept petrification in a sacrificial act to protect their allies, solidifying their unity. Ginro adapts to covert operations, employing cross-dressing disguises and comedic tactics that merge humor with strategy. Though flawed, his journey reflects growing courage, loyalty, and reliance on camaraderie, transforming him from a timid guard into a steadfast ally within the Kingdom of Science.