Atsuko Kagami, nicknamed Akko, is an elementary school girl fascinated by mirrors. When her cherished mirror breaks, she respectfully buries it. This act draws the attention of the Queen of the Mirror Country, who rewards her with a magical compact mirror. This mirror grants Akko transformation abilities activated by the incantations "tekumaku mayakon, tekumaku mayakon" and "lamipus lamipus lu lu lu lu lu." A strict condition requires her to keep this power secret; later versions introduce the consequence of her reflection vanishing if exposed. Akko possesses a distinctive hairstyle featuring pigtails and a large, fluffy bouffant-like swell on her crown, often adorned with a headband and ribbons. Anime depictions show her with straight, waist-length hair when down. Her attire varies: original manga illustrations feature dresses or separates, while anime adaptations standardize outfits—a white blouse with red vest and skirt (1969), a red "A" jacket with yellow skirt (1988), and the same jacket with a pink skirt (1998). Her manga design closely resembles Totoko from Osomatsu-kun, though anime versions differentiate her through subtler facial features and eye details. Her personality is cheerful, friendly, and mischievous. Adaptations adjust her traits to align with contemporary trends. The original manga portrays innocence and strong will, using the mirror for helpful acts and pranks, often resolving situations. Later iterations, like the Nakayoshi manga, depict more casual and chaotic use of the mirror, sometimes leaving consequences unresolved. Core traits of brightness and occasional impulsiveness persist across adaptations. Key relationships include her mother, who gifted the original mirror; her father, initially absent but later depicted as a ship captain or newscaster; and her best friend Moko, sharing a mostly harmonious bond. She treats Kankichi like a younger brother, mixing gentleness and discipline. Neighborhood bully Taisho frequently antagonizes her, though secretly harboring a crush, leading to conflicts involving his brothers and henchmen. Other characters are Chikako, a friend prone to spying; Ganmo, a minor acquaintance; Sato-sensei, her homeroom teacher; Moriyama-sensei, her English teacher; and Kobayashi, an older brother figure boarding at her home in early manga chapters. Akko's use of the mirror evolves across media. Early narratives focus on learning responsibility through magical mishaps, like losing the mirror or nearly revealing her secret. The 1969 anime heightens stakes with the reflection-disappearing penalty. The Nakayoshi manga shows more reckless transformations, such as altering a classmate without considering long-term effects. The live-action film reimagines her as a 22-year-old college student using the mirror to save a company from a takeover, blending magic with adult themes like romance and professional challenges.