Reanne Griffith, known as Hazuki Fujiwara in Japanese, is a gentle and intelligent elementary school student from a wealthy family. She shares a deep, long-standing friendship with the main protagonist since kindergarten, acting as her closest companion and eventually becoming a deuteragonist. Her appearance features long brown hair usually in a ponytail tied with an orange bow, round glasses over brown eyes, and an early outfit of a cream vest over a white shirt paired with an orange pleated skirt, later changing to a cream shirt with an orange skirt.

Hazuki possesses a shy, passive, and sweet nature, prioritizing harmony within her friend group and often mediating conflicts. She struggles to express her own desires, especially to avoid disappointing her mother, who chooses clothes Hazuki dislikes. Academically excellent, she consistently ranks near the top of her class. Her extracurricular activities include violin lessons and ballet; she initially took up violin at her mother's request but grew to genuinely love it. She harbors a strong fear of ghosts, appreciates unconventional humor, prefers fish and chiffon cake while disliking meat and cucumbers, and is skilled at origami.

As the second Orange Witch Apprentice recruited after being discovered spying on magic, her transformation phrase is "Pretty Witch Hazuki tchi!" and her primary spell incantation is "Paipai Ponpoi Puwapuwa Puu!". Early transformations were hindered by her glasses snagging the uniform. Within the group, she demonstrates relative proficiency in spellcasting, though occasional errors occur in magical animation. Her fairy companion is Rere.

Her relationship with the main protagonist is deeply interdependent and emotionally open, though differing viewpoints sometimes lead to distressing arguments. With the other witch apprentices: concern evolves into camaraderie with the initially brash Aiko; shared maturity and femininity foster understanding with Onpu; initial friction with Momoko resolves into a friendship strengthened by mutual timidness; and she shows gentle, maternal care towards Hana, assisting with studies and encouraging good behavior. A significant subplot involves her childhood connection and romantic feelings for classmate Masaru Yada, causing turmoil when sensing potential rivalries or secrets. Fujio expresses romantic interest that she does not return due to her feelings for Masaru. She also shares a close, grandmotherly bond with the family housekeeper, Baaya, receiving encouragement and life advice.

Her character development focuses on overcoming passivity and learning self-assertion. Initially unable to voice preferences or confrontational feelings, experiences within the witch apprentice group—caring for Hana, managing their transformed magical shop, and navigating conflicts—gradually build her confidence and independence. A pivotal moment occurs when she directly communicates her feelings to Masaru. Ultimately, she chooses not to become a full-fledged witch to maintain a normal human lifespan alongside her peers. Her future path leads to the prestigious Karen Girls High School to pursue violin studies, reflecting her commitment to personal aspirations developed throughout her journey.