Doremi Harukaze, called Dorie Goodwyn in English adaptations, begins as an ordinary elementary school student plagued by constant misfortune. She proudly declares herself "the unluckiest pretty girl in the whole world," citing recurring mishaps like repeatedly missing steak dinners and ruined ice cream—running gags defining her early story. Her family includes argumentative parents and a younger sister, Pop Harukaze (Caitlyn Goodwyn). Initial rivalry stems from Pop’s perceived reliability contrasting with Doremi’s clumsiness, though their dynamic gradually shifts toward mutual respect and protection.

Physically, she has fair skin and long red hair typically styled in twin buns secured by pink scrunchies—one decorated with a yellow music note—alongside short, uneven bangs featuring a distinctive upward-pointing section. Her round, mulberry-colored eyes accentuate highly expressive facial features capable of broad comedic expressions. She favors a carnation pink T-shirt layered under a purple tank top or vest, paired with loose pink denim shorts that later shift to lilac. Her attire includes pale pink socks extending to knee-length over time and fuchsia-and-white sneakers with peach or white shoelaces.

Her personality blends childish impulsiveness with deep compassion. Chronic clumsiness and academic struggles fuel self-doubt, yet she tenaciously helps others—even those she dislikes, like the initially arrogant Reika Tamaki. A voracious appetite and romantic idealism drive her actions; frequent crushes lead her to adopt hobbies like sports or music to connect with boys, though piano skills remain stunted by a traumatic childhood recital failure. She rebounds swiftly from jealousy or petty conflicts but reacts intensely to betrayals or threats against loved ones.

Her witchcraft journey starts after accidentally discovering Majo Rika’s (Patina) true identity, turning the witch into a frog. To reverse this, she becomes a witch apprentice, later recruiting friends Hazuki Fujiwara (Reanne Griffith) and Aiko Senoo (Mirabelle Haywood) to share the secret. As the first "Ojamajo" (bothersome witch), she wields a pink bean-shaped crystal ball, casting spells like "Pirika Pirilala Poporina Peperuto!"—though magic often misfires due to distractions or emotional turmoil. Her role expands upon witnessing Hana’s birth, a magical baby destined for queenship. Recognized as Hana’s "true mother" for being the first face seen after birth, she exhibits fierce protectiveness and nurturing dedication, maturing from overbearing tendencies to balanced caregiving.

Key relationships fuel her growth: a six-year classroom feud with Tetsuya Kotake involves mutual teasing—he dubs her "Dojimi" for clumsiness—but evolves into friendship and romantic feelings. She chooses him over Akatsuki of wizard group FLAT4 after recognizing Akatsuki’s dishonesty. Her bond with idol witch apprentice Onpu Segawa (Ellie Craft) begins with admiration, sours into rivalry when Onpu uses forbidden memory-altering magic, and solidifies into steadfast friendship after Doremi intervenes to save Onpu from magical backlash. She also aids classmates like Kayoko Nagato in overcoming school phobia, demonstrating an ability to inspire trust.

Across the series, she matures from a self-proclaimed unlucky girl into responsibility. Early reliance on magic for personal gain diminishes as she learns to achieve goals through ordinary effort, like mustering courage for confessions without spells. In the finale, she and her friends renounce witchcraft to remain human, sacrificing their powers to create a new crystal ball for Hana—underscoring acceptance of human limitations and commitment to genuine effort over magical shortcuts. Her elementary school graduation leads toward individual dreams; light novels later depict her as a teacher who continues prioritizing human connections over supernatural solutions.