Ginro, a young guard of Ishigami Village, serves alongside his older brother Kinro. His androgynous frame, medium-length blond hair obscuring the left side of his face, round green eyes, and delicate features enable him to pose as a woman during undercover missions in the Petrification Kingdom. Clad in a blue karate gi and belt, he wields a spear, later replaced by a steel katana. Prone to cowardice and laziness, Ginro habitually shirks labor or perilous duties, relegating himself to a "pack mule" role in the Kingdom of Science. Yet flashes of valor emerge when defending allies or family, such as overcoming terror to save Chrome from a toxic spring during a sulfuric acid mission, spurred by Senku’s guidance and Kaseki’s teachings on fear as instinct. His loyalty surfaces again when he defies strategic orders to preserve Kinro’s life during Hyoga’s assault. Blending selfish whims with earnest loyalty, Ginro openly voices fears of hazards like poison gas or insects, contrasting peers who cloak vulnerabilities. He meddles playfully in others’ affairs, prodding Chrome about Ruri or proposing romantic phone confessions, though his self-serving bid for village chief backfires. Lecherous antics—harem fantasies or peeking at skirts—invite comedic reprisals, like Kohaku’s punch post-rescue. Notable arcs include Matsukaze’s mistaken allegiance on Treasure Island, where the warrior shields Ginro, misidentifying him as a fallen mentor. This grants Ginro fleeting authority, sustained even after the error is revealed. Later, while gathering intel against the Petrification Kingdom, he suffers mortal wounds, saved only by Kohaku’s swift petrification and revival fluid. His toolkit includes a silver-plated spear detecting toxic fumes and ethyl acetate hidden in a pineapple during infiltrations. Though combat skills remain middling, he compensates with flair and endurance, spinning generators with Kinro or enduring Argo’s blows in tournaments, bolstered by Senku’s placebo energy tonic. Evolving from a comedic liability to a risk-taking ally, Ginro nears self-sacrifice for crucial intelligence and sharpens his resolve to protect Kinro. Their bond balances Kinro’s discipline against Ginro’s laxity, underpinned by unshakable brotherly devotion.