Kenji Miyazawa hails from Ihatovo, a remote rural village devoid of modern technology like phones or electricity, where daily life operated on bartering instead of currency. His upbringing instilled deep sincerity towards all beings, solidifying his belief that honesty always receives a positive response. Physically, he appears as a youthful 14-year-old boy with blonde hair, gold eyes, freckles, and a slight build. He dresses in practical farm work clothes: blue overalls, a beige shirt, a straw hat worn around his neck, and often goes barefoot. This innocent look belies his supernatural ability, "Undefeated by the Rain," granting immense physical strength and near-invulnerability. He can lift vehicles, withstand bullets, or reshape mountains, but the power activates only when hungry; eating causes immediate sleep. A pivotal past event involved a catastrophic 50-year landslide threatening Ihatovo. Kenji single-handedly altered the mountain's shape to divert floodwaters, saving the village. Tragically, his best friend died during this event, though Kenji later claimed no memory of the loss. Yukichi Fukuzawa investigated the village's survival, learned of Kenji's actions, and recruited him into the Armed Detective Agency. Within the agency, Kenji approaches investigations with straightforward sincerity, frequently accepting suspects' denials at face value before confronting them later when evidence emerges. Colleagues like Kunikida deem his methods unconventional, as he uses his strength to subdue culprits, earning a fearsome reputation among Yokohama's criminals. Despite naïveté about urban concepts, he solves difficult cases at a high rate. Kenji participated in key conflicts. During the Guild Arc, he assisted in repelling Port Mafia and Guild forces. In the Cannibalism Arc, he evacuated Fukuzawa during a Port Mafia hospital attack. When the agency was framed for terrorism, he wore riot gear and bolstered morale by invoking his village's resilience after a storm destroyed their orchard, urging his comrades to "trudge past the storm." His personality shifts drastically when comrades face extreme danger. Learning of Atsushi Nakajima's torture by the Hunting Dogs triggered a feral state, overriding his typical gentleness with overwhelming rage. This duality led to a citywide warning: "You must never make Kenji angry." Kenji maintains close bonds with agency members, sharing meals and offering encouragement. He remains unfazed by Yosano's painful healing ability, smiling through procedures others find agonizing. His catchphrases reflect his philosophy, like quoting his ability's namesake poem: "Undefeated by the rain, undefeated by the wind..." Trivia notes include his family motto—"If a cow defies you, strike it with something handy"—and his August 27 birthday, matching the real-life author he references. The name "Ihatovo" alludes to the real Kenji Miyazawa's idealized version of Iwate Prefecture.