Hazuki Fujiwara, a central figure, begins as a sheltered elementary school student with fair skin, long brown hair often in a ponytail secured by an orange bow, and distinctive round glasses. Her appearance shifts across the series: early seasons feature a white shirt under a light yellow-orange vest with an orange pleated skirt, later replaced by a light yellow-white blouse and light orange skirt.

Born February 14th into wealth, her father is a prominent film director and her mother, Reiko Fujiwara, a businesswoman. Reiko's unfulfilled ambitions drive her to tightly manage Hazuki's schedule, enforcing violin, ballet, and other structured activities. Feeling stifled, Hazuki hides her discomfort to avoid parental disappointment. She shares a close, grandmotherly bond with Baaya, the family nanny who also cared for Reiko.

Inherently gentle yet resilient, Hazuki excels academically, ranking among the top students. She exhibits politeness and maturity, especially around younger children, but grapples with timidity, low self-confidence, and a fear of ghosts—often invoking thoughts of the witch Majo Rika for courage. Despite her anxiety, she displays unexpected determination and stubbornness when confronting perceived injustices. Her selflessness frequently borders on self-sacrifice, prioritizing others' happiness.

Her journey as a witch apprentice starts upon discovering Doremi Harukaze's magical secret with Aiko Senoo. To preserve it, Hazuki becomes an Orange Witch Apprentice partnered with the fairy Rere. Her magical incantations are "Paipai Ponpoi Puwapuwa Puu!" for spells and "Paipai Ponpoi, Shinayaka ni!" for her Magical Stage. Initial struggles, like her glasses snagging during transformations, give way to spellcasting aptitude. Her magic often animates objects or imbues flexibility, reflecting her orange theme and heart-shaped crystal ball.

Relationships drive her development. Her childhood friendship with Doremi serves as her emotional anchor, allowing vulnerability. She harbors deep romantic feelings for classmate Masaru Yada, stemming from his kindergarten comfort after a hat incident; this affection causes significant turmoil when she perceives threats to their connection. Among fellow witch apprentices, she shares a quiet understanding with the similarly feminine Onpu Segawa and initially clashes with Momoko Asuka over a blunt correction before reconciling. She develops a nurturing dynamic with the magical baby Hana, assisting her studies and gently guiding her behavior.

Her arc centers on gaining independence and self-assurance. Early dependence on parental approval and Doremi's support gradually shifts as she learns to assert her desires, culminating in choosing to attend a prestigious secondary school separate from her friends—symbolizing her growing confidence and willingness to forge her own path while maintaining enduring bonds. Navigating parental expectations and personal relationships contributes to her maturation.