Kinro guards Ishigami Village alongside his younger brother Ginro. He possesses a muscular build, stands slightly above average height, and features brown hair, green eyes, and a distinctive scar on his right cheek. A long lock of hair hangs between his eyes. Initially nearsighted, he concealed this impairment despite its combat disadvantages. His standard attire is a sleeveless royal blue karate gi-like uniform secured by a rope belt, paired with a buckler displaying the village's star pattern. Corrective glasses received during the village tournament became a consistent part of his appearance. He later adopted a katana after Hyoga's raid but ultimately returned to his signature spear. On rare occasions, such as visits to Yuzuriha's clothing store, he wears modern outfits. His personality centers on strict adherence to rules and duty, frequently repeating his motto, "Rules are rules." He demonstrates unwavering principles, initially refusing Senku entry despite Senku saving Kohaku and rejecting inventions like ramen as "sorcery." He despises laziness and cheating, opposing tactical additions to village games even to cure Ruri. Despite this rigidity, he proves capable of growth, accepting Senku's science after glasses rectify his vision. He exhibits fierce loyalty, protecting villagers and sacrificing himself during Hyoga's raid by having Ginro collapse a bridge while he remained fighting. Though prideful and emotionally reserved—concealing his vision problems and reacting stoically to threats—he displays hidden enthusiasm for innovations like automated generators and automobiles. He shows possible romantic interest in Kirisame, valuing skill over superficial traits. As a warrior, Kinro ranks among Ishigami Village's strongest, rivaling Magma and Kohaku. His combat abilities include proficient spearmanship, later augmented by swordsmanship during the Empire of Might conflict. Enhanced physical prowess, strength, and stamina allow him to power generators for extended periods and endure brutal fights, such as his victory over Magma post-vision correction. Statistical assessments rate his power at 3/5 (C), speed at 2/5 (D), technique at 3/5 (C), and reach at 4/5 (B). His myopia initially hindered him, but corrected vision enabled him to overwhelm opponents. His journey begins enforcing village rules against outsiders, though Senku bribes him by gilding his spearhead—a gift Kinro cherishes. He participates in the village tournament to aid Kohaku's sister, using Suika's improvised glasses to defeat Magma but questioning their legality. After joining the Kingdom of Science, he contributes to projects like the generator and literacy programs, overcoming initial dismissiveness toward non-combat skills. During Hyoga's assault, he sustains severe injuries but resumes guard duty prematurely, emphasizing his dedication. In later arcs like the Age of Exploration and Treasure Island, he assists in expeditions and battles, ultimately being petrified aboard the Perseus. Post-revival, he continues as a steadfast defender within the Kingdom of Science. His name translates to "golden wolf," referencing the gilded spear and aligning with Ishigami Village's metal- and mineral-themed naming conventions. Relationships define key aspects: he acts as Ginro's moral compass, respects Kohaku's strength, and evolves from distrusting Senku to becoming a loyal supporter of scientific progress.