Atsuko Kagami, known as Akko-chan, is an elementary school girl who gains transformative abilities after receiving a magical mirror. Her origin consistently involves burying a broken favorite mirror respectfully, leading a mystical entity to grant her a magical replacement—an ornate antique mirror or compact. This entity varies: the "Man from the Mirror Country" in the original manga, a "Mirror Spirit" in some iterations, or the "Queen of the Mirror Kingdom" in later anime. The mirror's enchantments include "Tekumaku Mayakon" (or variations like "kumquat Mayan") for transformation and "Ramipus Ramipus Lu Lu Lu Lu Lu" (or similar phrases) to revert to her original form. A critical rule forbids revealing the mirror's existence, with later adaptations imposing the penalty of losing her reflection if exposed. Akko-chan's personality evolves across eras to reflect shifting ideals of a "modern heroine." In 1960s manga and anime, she is cheerful, innocent, and friendly, with mischievous tendencies and a strong moral compass, using transformations primarily to resolve conflicts, help others, or satisfy curiosity—occasionally for pranks. By the 1980s-1990s adaptations, she becomes more energetic, reckless, and tomboyish, employing her power chaotically or impulsively. Core traits persist: she remains kind-hearted, curious, and protective of loved ones, often confronting bullies or injustice. Transformations sometimes trigger unintended consequences, like being trapped in a form or nearly exposing her secret, demanding creative resolutions. Physically, she appears tall and slender for her age, featuring a distinctive hairstyle with pigtails and a large, fluffy bouffant crown, often accessorized by a headband and ribbons. Hair color shifts across adaptations: black in manga, medium brown in the 1969 and 1998 anime, deep purple in 1988. Clothing reflects eras: simple dresses in manga; a white blouse with red vest and skirt in 1969 anime; a red "A" jacket with yellow skirt in 1988; a similar jacket with pink skirt in 1998. Her design closely resembles Totoko from *Osomatsu-kun*, with subtle differences in eye shape and highlights noted in official artwork. Key relationships define her experiences. Her mother remains a constant, though interactions vary; her father is an absent ship captain in early versions but a present newscaster later. Moko, her tomboy best friend, forms a "Tomboy and Girly Girl" dynamic that shifts in intensity across eras. Kankichi, Moko’s younger brother, is treated like a sibling—sometimes gently, sometimes punitively. Taisho, a bully and rival introduced in anime, provokes conflicts while secretly crushing on her, adding comedic or dramatic tension. Chikako, a gossip-prone classmate, frequently spies on Akko, creating near-exposures of her secret. Teachers like homeroom instructor Sato-sensei and English teacher Moriyama-sensei occasionally entangle in transformation mishaps. Her cat, Shippona, appears in anime as a companion. The 2012 live-action film depicts an adult Atsuko as a 22-year-old college student. She uses transformations to navigate a corporate crisis at a cosmetics company and develops romantic feelings for an employee, Naoto. This iteration explores identity and sacrifice, as maintaining her adult form risks permanent separation from her true self.