Kenji Miyazawa hails from the remote, technology-free village of Ihatovo, where bartering and cow herding shaped daily life. This upbringing cultivated his sincere, trusting, and hospitable nature, firmly believing genuine kindness to others—people or animals—naturally invites positive responses, a core tenet he maintained even after moving to Yokohama. He wields superhuman strength and durability via his ability "Undefeated by the Rain" (雨ニモマケズ). This power enables feats like reshaping mountains barehanded to redirect landslides, lifting vehicles, or withstanding gunfire. Crucially, it only activates when he is hungry, and he falls asleep immediately after eating. His strength surges dramatically if friends face grave danger, though such rage can cause memory lapses, like forgetting his best friend's death during the village landslide. Physically, Kenji looks young for his 14 years. He has blond hair, gold eyes, freckles, and a slight frame (158 cm tall, 53 kg). His typical attire includes a straw hat, blue overalls over a beige shirt, and a black undershirt, usually barefoot or in sandals. He once wore riot gear when the Agency was framed as terrorists. Yukichi Fukuzawa recruited Kenji into the Armed Detective Agency after learning how he saved Ihatovo from a 50-year flood by altering the mountain's shape. As the Agency's youngest field investigator, his rural background informs his unique methods: he questions suspects directly, accepts their denials at face value, and leaves, often prompting confessions later from guilt or fear. Doppo Kunikida deemed this approach too idiosyncratic to teach newcomers like Atsushi Nakajima. His loyalty is steadfast across conflicts. During the Guild arc, he helped repel Port Mafia incursions and joined the defense team in the three-way ability war. In the Cannibalism arc, he aided evacuating Fukuzawa from a Port Mafia-besieged hospital and participated in the counterattack on their headquarters. His most significant shift came in the Hunting Dogs arc; learning of Atsushi's planned torture triggered his "menacing side," transforming him into a relentless force that overwhelmed Hunting Dog member Tetchō Suehiro. Despite this fury, he later offered aid to his defeated foe, reverting to his gentle self. He fosters warm Agency relationships, notably comforting colleagues during crises. His speech framing "disastrous storms" as "blessed rain" revitalized morale when they were framed as terrorists. He is also the sole person known to smile during Akiko Yosano's typically painful ability treatments. Trivia includes his family motto ("If a cow defies you, strike it with something handy"), birthday (August 27), and preferences for tempura soba and Mitsuya Cider. His hometown's name, Ihatovo, references the idealized Iwate Prefecture depicted by his real-world namesake Kenji Miyazawa, whose life and literary works inspired the character.