Haizakura works as a waitress at the Kuronekotei café. She has light peach-pink hair styled in a braid and bun, deep blue eyes, and stands 138 centimeters tall. Her attire consists of a predominantly white kimono with pink flower patterns, white thigh-high stockings, and sandals.

A factory reset erased Haizakura's memories prior to her arrival at the café, leaving her unfamiliar with the world and prone to clumsiness. Despite this, she exhibits a determined and hard-working personality, approaching tasks with curiosity and full effort. Her favorite food is anpan.

Haizakura's background involves service as an autonomous mechanical doll during a large-scale war. The memory loss resulted from overloading her logic mechanisms while controlling multiple mechanicum units, a common cause of amnesia among automata like her. In the post-war world, she struggles to recall her original function but actively seeks to understand her purpose and place within the peace.

She possesses a strong affinity for music, enjoying listening to songs, playing with children, and dancing. Initially, she cannot synchronize her singing with musical accompaniment, likening the experience to reading a book aloud. This limitation evolves significantly when she discovers her ability to influence other dolls through song. In one instance, her singing disrupts external control over another doll, halts aggressive actions, and conveys the reality that the war has ended.

Haizakura's relationships with fellow dolls and humans at the café gradually expose her to fragmented elements of her past. Her journey centers on reconciling her identity as a former weapon with her current life, culminating in proactive use of her abilities—such as singing—to aid others and assert autonomy. Her story reflects themes of recovery from trauma and the search for meaning beyond programmed functions.