Yachiho Azuma, older sister to Himari Azuma and Vice-Chief of the Anti-Demon Corps' 6th Unit, possesses fair skin and long blue hair typically worn in white-ribboned twintails. She dons the standard Corps uniform: a navy blue short-sleeved top, red belt, long skirt, high-heel boots, and white gloves. Her personality presents outward confidence in her abilities, sometimes bordering on perceived invincibility, yet she maintains an awareness of her own limits. She often behaves condescendingly, particularly toward her younger sister Himari, whom she openly criticizes for perceived weakness. This contrasts sharply with her respect for recognized superiors like Kyouka Uzen. Influenced by her Peach Blessing powers and an interest in poetry, Yachiho maintains an obsession with elegance and speaks in a manner reminiscent of an elderly intellectual. Underneath this exterior lies a deep, almost obsessive affection for Himari, evidenced by her collection of Himari's childhood photos in her bedroom. Yachiho struggles to express these feelings directly, frequently resorting to teasing or attempts to persuade Himari to return to the Azuma estate for training. She prioritizes Himari's safety above all else, willing to expend her own stamina using time-manipulation to save her, and reacts intensely to Himari's rejections. As one of the eldest daughters of the prominent Azuma family, Yachiho excelled alongside her sisters except Himari. Childhood interactions suggest a formerly close relationship where Yachiho took photographs of Himari, a dynamic that later shifted toward constant teasing and belittlement. Her primary ability, the Peach Blessing Golden Hour gained from consuming a Mato peach, allows her to stop or rewind time for five seconds by striking specific poses. Extended use depletes her stamina, limiting prolonged engagements. A more advanced application, Prime Time, extends the duration to ten seconds following a "supreme pose." These powers provide tactical advantages, enabling her to evade attacks, reverse injuries like reattaching severed limbs, or set up combat scenarios—such as firing bullets during frozen time that impact targets when time resumes. She wields a specially blessed handgun optimized to synergize with her time manipulation. Key conflicts reveal her development. During the Mato Exhibition Games, Yachiho battles Himari and Yuuki Wakura, employing Golden Hour and revealing Prime Time to gain an initial advantage. After defeat, she acknowledges Himari's growth but frames it as preserving the Azuma family's reputation. Later, in the Hidden Village arc, they fight together against humanoid Shuuki. Yachiho initially attempts to direct the battle alone but gradually accepts Himari as an equal partner, culminating in mutual protection: Yachiho rewinds time to counter threats to Himari, while Himari shields Yachiho from attacks. Despite this cooperation, Yachiho continues to couch her care in terms of family obligation, persistently inviting Himari to return home even as Himari reaffirms her commitment to the 7th Unit.