Hazuki Sakurazaka is the head maid of the Nogizaka household, primarily overseeing the care of Haruka and Mika Nogizaka. Her long-term involvement since Haruka's childhood fosters a relationship closer to an older sister than a mere professional. She typically presents a reserved and expressionless demeanor, though she occasionally makes surprising or impactful statements. Despite her composed exterior, she possesses a strong affinity for cute objects, maintaining an extensive collection of named stuffed animals.

A defining aspect of her character is her sudden appearances wielding a chainsaw, a behavior stemming from protective instincts when perceiving threats to Haruka. This juxtaposition of calm authority and unexpected intensity characterizes her role. Her loyalty centers firmly on Haruka, driving her personal, heartfelt support for Haruka's otaku interests. She facilitates activities like doujinshi creation despite Haruka's lack of artistic skill, a role extending into spin-off media like the visual novel "Doujinshi Hajimemashita."

Her background includes a singular incident of drunkenness where she collided with a lamppost or door while maintaining unusual dignity, noted as exceptional due to her commitment to duty. Her name, combining the characters for "leaf" (葉) and "moon" (月), reflects her cultural origins.

Across all appearances, she remains consistent: a disciplined caretaker whose unflappable presence masks deep devotion and readiness to act decisively for the Nogizaka family's welfare, particularly Haruka's safety and happiness.