Hazuki Sakurazaka is the head maid of the Nogizaka family, primarily responsible for the care of Haruka and Mika Nogizaka. Her duties center especially on Haruka, sharing a relationship closer to an older sister than staff, marked by deep trust and affection. She has cared for the sisters since their childhood, providing care described as maternal.

Her demeanor is typically reserved and expressionless, maintaining composure and professionalism in all situations. Despite this stoic exterior, she occasionally delivers surprising or impactful statements. She possesses a notable fondness for cute objects, evidenced by her extensive collection of individually named stuffed animals.

A defining trait is her sudden appearance wielding a chainsaw, her defensive weapon of choice when perceiving threats to those she protects. This readiness to deploy the chainsaw contrasts sharply with her otherwise calm conduct, though she returns to composure immediately afterward.

Her loyalty focuses intensely on Haruka, leading her to actively support Haruka's pursuit of otaku interests despite societal expectations tied to the family's status, recognizing the sincerity of Haruka's passions. While generally maintaining dignity, one recorded incident involved her colliding with a lamppost or door while intoxicated—a rare occurrence due to her strict avoidance of anything hindering her duties.

Physically, she stands 163 centimeters tall with figure measurements of 82-57-82 centimeters, lilac hair typically in a tightly coiled bun with spiky bangs, and olive-colored eyes. Her role and personality remain consistent throughout all series installments, including the finale storyline.