Mitsuko Horie is a highly influential Japanese actress, voice actress, and singer, widely regarded as a legend in the anime industry. Born on March 8, 1957, in Yamato, Kanagawa, she is affectionately known to fans as Micchi and is celebrated with titles such as the "Queen of the Anison World" for her monumental contributions to anime music. From a young age, Horie was musically inclined, starting violin lessons at six. Her path to stardom began in elementary school after gaining attention on a television singing competition, which led to her professional debut at just twelve years old. She is represented by the talent agency Aoni Production.

Horie's career is uniquely distinguished by her parallel success as both a top-tier voice actress and a singer who has performed theme songs for hundreds of anime series. Her voice acting debut came in 1978, and she has since brought to life a vast array of characters, demonstrating remarkable range. She is particularly renowned for her leading roles in Nippon Animation's World Masterpiece Theater, where she has voiced heroines more times than any other actress. These iconic roles include Remi in Remi, Nobody's Girl, Judy Abbott in My Daddy Long Legs, and Pollyanna Whittier in The Story of Pollyanna, Girl of Love. She also lent her voice to Jeanie in Kaze no Naka no Shoujo Kinpatsu no Jeanie.

In the magical girl genre, Horie has played several quintessential characters. She starred as the titular character Atsuko Kagami in Himitsu no Akko-chan and as Lalabell in Mahou Shoujo Lalabel. Her filmography also includes beloved and powerful figures in action and fantasy series. She is well-known as the cheerful robot Obotchaman in the original Dr. Slump and its films, and as Upa in Dragon Ball. She has also taken on memorable antagonistic roles, such as the menacing Sailor Galaxia in Sailor Moon Sailor Stars and the regal Polaris Hilda in the Saint Seiya saga. Her talent extends to more mature and varied projects, including the role of Kyoko Jounouchi in the cyberpunk OVA Cyber City Oedo 808. Her extensive work also includes the role of the Narrator and numerous princesses in the series Grimm's Fairy Tale Classics, as well as Miyuki Moriki in Submarine Super 99, and characters like Mirai in a Galaxy Express 999 film and Baraba in Chōnōryoku Shōjo Barabanba.

Beyond her acting, Horie's musical career is nothing short of extraordinary. She has recorded over 900 songs, and her powerful and emotive voice has defined the sound of anime for decades. Her first theme song was for the 1969 series Judo Boy. She achieved superstardom with her performance of the opening theme Watashi wa Candy for the global hit Candy Candy in 1976. She made history as the first woman to sing the main theme for a robot anime with Voltes V no Uta. Other iconic theme songs include those for Hana no Ko Lunlun, Hello! Sandybell, and Mahou no Mako-chan. Her collaborations with fellow anisong legends like Ichirou Mizuki and Isao Sasaki on songs such as Susume! Gorenger and Cross Fight! are celebrated milestones in the industry. Her influence is so profound that her song for Voltes V became a cultural phenomenon in the Philippines.

Throughout her career, Horie has received immense recognition for her contributions. She is considered one of the "Four Kings of Anime Songs," a testament to her impact on the genre. She has served as a judge for the Animax Anison Grand Prix, helping to discover new talent. In a testament to her enduring legacy, she continues to perform and voice new characters, such as the Professor Woodward in the 2017 series Little Witch Academia. She has also dedicated herself to nurturing future generations by founding a vocal school in Tokyo. Mitsuko Horie's sixty-year career, marked by her dual-threat talent and an unmatched catalog of beloved performances, has cemented her status as a true icon and a foundational pillar of Japanese pop culture.