Kazuho Miyauchi, the sole teacher at Asahigaoka Branch School, once attended the same school as a student. Now 24, she is the eldest daughter of the Miyauchi family, with younger sisters Hikage and Renge. Her family operates rice plantations, and Kazuho has assisted with this demanding work since her student days, leading to frequent exhaustion and a perpetually sleepy demeanor. This fatigue manifests in her habit of keeping her eyes closed. Physically, Kazuho possesses dark violet hair styled in a ponytail with side bangs. She typically wears plain clothing, often paired with a lab coat while teaching. Her consistent appearance throughout the series reflects her practical, low-key nature. Personality-wise, Kazuho often appears lazy and irresponsible, napping during school hours or delegating tasks even to her students. This stems partly from her classroom structure, where multi-grade students engage in self-directed study, limiting her direct instruction mainly to test corrections. Despite this laid-back front, she asserts authority over her sisters, scolding Hikage for misbehavior or discouraging her from begging. As the most available adult in Asahigaoka, she frequently serves as the default supervisor for village children during activities. Her background reveals deeper layers. Growing up in Asahigaoka grants her intimate understanding of rural life. Her sustained commitment to family responsibilities, particularly laboring in the rice fields, demonstrates a work ethic starkly contrasting her lethargic school persona. This duality suggests her tiredness stems more from balancing demanding physical labor with teaching duties than indolence. Subtle character development occurs across the series, including all seasons and the film *Non Non Biyori Vacation*. While core traits persist, later moments showcase increased competence and dedication. She mentors newcomers like Akane and adapts to challenges during the Okinawa trip, revealing capability beneath her sleepy exterior. Interactions with community members, such as Kaede Kagayama (who occasionally uses "Sensei"), highlight her respected role despite quirks. Relationships are central to Kazuho. She maintains a supervisory yet caring dynamic with her students, including sister Renge, who occasionally chides her for laziness yet implicitly trusts her. Her history with fellow Asahigaoka graduates like Kaede and Yukiko Koshigaya reflects deep bonds within the close-knit community. Notably, she employs creative solutions in teaching, like using a xylophone as the school bell. Her name, meaning "one grain," symbolically ties to her rural roots and unassuming presence. Throughout the series, her role subtly emphasizes themes of continuity and quiet resilience within Asahigaoka’s slow-paced life.