Hazuki Nanakusa serves as the office assistant at 283 Production. At twenty-two years old, she is the older sister of Nichika Nanakusa, who is an idol in the agency. Hazuki stands 160 centimeters tall and hails from Saitama.

Hazuki presents a calm and relaxed exterior, often appearing sleepy or drowsy. Beneath this laid-back surface, however, she is an incredibly diligent and hardworking secretary. Her personality is defined by an easygoing and honest nature, making her approachable and kind to every idol under her care. Her gentle and consistent demeanor acts as a direct foil to the more serious attitude of President Tsutomu Amai.

Despite her own drowsy tendencies, Hazuki possesses a unique ability for short sleep, allowing her to function effectively without extensive rest. She is remarkably multi-talented, providing practical support that goes far beyond typical administrative duties. She actively assists the idols with voice lessons, dance training, and even make-up sessions. Her diverse skill set also includes budget cooking, penmanship, customer service, calculator use, and traffic control, many of which she acquired through various part-time jobs. Outside of work, her hobbies include collecting sleep-related goods, with a particular fondness for eye masks and neck pillows.

Her primary role at the production office is to keep operations running smoothly, creating a stable and nurturing environment for the talent. While she is not an idol herself, her close working relationship with her younger sister, Nichika, provides a personal connection to the challenges and dreams of the performers. Through her consistent hard work and multifaceted abilities, Hazuki Nanakusa proves to be an indispensable pillar of support for 283 Production, balancing her own sleepy disposition with an unwavering commitment to her duties.