Mie Sonozaki is a Japanese voice actress, singer, and narrator born on February 7, 1973, in Tokyo, Japan. Her path to voice acting was shaped by early exposure to the performing arts, as her mother ran a ballet school, leading her to study classical ballet from elementary school. She later joined her high school's drama club. After graduating from junior college with a degree in nutrition, she enrolled in the Haikyo Acting Institute to pursue professional training.

Sonozaki's career began in 1997, initially using the hiragana stage name "そのざきみえ". She changed her stage name to its current kanji form, 園崎未恵, in 2002. For many years, she was affiliated with the agency Remax before transitioning to freelance work in 2019, although she maintains a business partnership with them.

Her voice is known for its versatility, allowing her to portray a wide spectrum of characters, from young boys and girls to mature, stoic, or passionate women. One of her most iconic and long-running roles is that of Gertrud "Trudy" Barkhorn in the long-running Strike Witches franchise, a character she has voiced across multiple television series, OVAs, and films, including Strike Witches: Road to Berlin. She also provided the voice for Gertrud in the comedic spin-off World Witches Take Off!.

Beyond this signature role, Sonozaki has built an extensive and varied filmography. She is recognized by audiences for roles such as Noriko Aoi in Aoashi and Yōko Miyakoshi in WWW.WAGNARIA!!. She has also lent her voice to numerous other characters, including Nein Aular in Fairy gone, Rin Mashiki in Convenience Store Boy Friends, Hiroyuki in Kemono Michi: Rise Up, Paula Dickins in Great Pretender, Xiaolongnü in Legend of the Condor Hero, Olivia vel Vine in The Greatest Demon Lord is Reborn as a Typical Nobody, Lusamine in Pokémon Evolutions, Mosako Aburana in KY Kei JC Kuuki-chan, Madame Kurenai in Edens Zero, Audrey in Eiga Oshiri Tantei Shiriarty, Dominique Saint-Pierré in Legend of the Galactic Heroes: Die Neue These series, Wen Sō in World Trigger, and Yo Tanwa in Kingdom. In addition to these, her filmography includes the role of Subaru Kujou in Sakura Taisen: New York NY., Tailmon in Digimon Adventure:, the villainous Darknest/Ophiuchus in Star Twinkle Precure, Chime in Be-yond, Bunji in Kaasan - Mom's Life, Hazuki Yazakura in the Happy Lesson series, Miyuki Iijima in Elf ban Kakyuusei, Jello Seitaishi in Happy Lucky Bikkuriman, Aoi in Gegege no Kitarō, Eriko Takeda in Yu-No, Ayaka in The Desert Island Story X, and Jeanne in the film Bayonetta: Bloody Fate. Her range extends to characters like Akari Hinobori in Battle Spirits: Heroes, Neredia Ricke in Uchū Senkan Yamato 2199: Hoshi-Meguru Hakobune, Lilith in Cyborg 009 Vs. Devilman, a mother in Future's Folktales, Kuchisake Onna in Gakkō no Kaidan, Koto Nakazawa in Meiji Gekken: 1874, and Brandy Blumenthal in High Card.

Sonozaki is also highly prolific in the video game industry. She is the long-standing voice of Arle Nadja in the Puyo Puyo series. Other notable game roles include Crimson Viper in the Street Fighter series, Jeanne in the Bayonetta series, Ashe in Final Fantasy XII, Jihl Nabaat in Final Fantasy XIII, Moira in the Japanese version of Overwatch, and Cynthia in Pokémon Masters.

A significant part of her career involves Japanese dubbing for foreign films and TV series. She is the official Japanese voice for several Hollywood actresses, including Hayley Atwell, Kirsten Dunst, and Elisha Cuthbert.

Outside of acting, Sonozaki is known for her diverse interests and qualifications. She holds a中国政府 (Chinese government) certified初级茶艺师 (Junior Tea Ceremony Master) qualification and is also a certified onsen sommelier. She has also worked as a narrator and announcer.