Ai Satou is a highly respected Japanese voice actress and actress, born on February 12, 1955, in Tokyo, Japan. She is affiliated with the talent management firm Ken Production. Her birth name is Kiyoko Satou, and she has also used the stage name Ai Sato. A graduate of Aoyama Gakuin University, she has built a prolific career spanning from the 1980s to the present day, becoming a familiar voice in Japanese animation.

Satou's career is marked by an extensive and diverse range of roles in television anime, original video animations, and theatrical films. Her voice work includes the role of Komakaachan in the Yo-kai Watch! series, the Narration for Kiku-chan to Ōkami, and both Nurse and Saeko in Kotowaza House. She is also known for playing Yuki in Idol Densetsu Eriko, Mariko Juumonji in Prince Mackaroo, the Gakuenchou (school principal) in Gakuen Utopia Manabi Straight!, and Sakie Kannazuki in Twin Angel: Twinkle Paradise.

Beyond the roles listed, her filmography is extensive and features many prominent series. She is particularly recognized for voicing warm, motherly characters, a niche where her soothing and expressive delivery has made her a favorite. Notable examples of this include Sachi Yagami in Death Note, Mrs. Bradley in Fullmetal Alchemist: Brotherhood, and Yoko Hoshikawa in Brave Exkaiser. Her voice can also be heard in long-running franchises such as Pocket Monsters (Pokémon), Detective Conan, Crayon Shin-chan, and Chibi Maruko-chan.

In addition to anime, Satou has a significant career in voice dubbing for foreign films and television series. She is well-known as the regular Japanese dubbing voice for American actress Kathy Najimy, replicating her performances in films like Sister Act and Hocus Pocus. Her other prominent dubbing roles include Petunia Dursley in the Harry Potter film series, Mon Mothma in various Star Wars productions, and Ugga Crood in The Croods animated movies. Her work also extends to video games, with performances such as Jessica in the Langrisser series and Jessie's mother in Final Fantasy VII Remake.

While she may not have received major international awards, Ai Satou's longevity and consistent body of work have cemented her status as a pillar of the voice acting industry in Japan. Beyond performing, she contributes to the next generation of talent as a lecturer at the voice acting school School Duo. Her hobbies, which include traditional Japanese dance and playing the saxophone, reflect a deep engagement with her cultural heritage.