Aya Saitou is a Japanese voice actor from Hokkaido, born on February 17, 1993. She is affiliated with the talent agency Ken Production. Saitou's path to voice acting began with an initial interest in becoming a stage actor or dancer, a goal inspired by a desire to work with someone she admired. While studying drama at a vocational school, she decided to pursue a career as a voice actor, with the personal aspiration of one day starring in an anime adaptation of a manga written by her sister, who is a manga artist. She is a graduate of the 13th term of School-Duo, the training school affiliated with Ken Production, and officially joined the agency in April 2013.

Saitou has built a career with a wide variety of roles in anime, video games, and foreign language dubs. One of her notable early roles was in 2013 as国立水穗 (Mizuho Kunisato) in the television anime Silver Spoon. She is also recognized for voicing the character 克雷多·德·耐尔 (Cleo de Nile) in the 2014 Japanese original net anime Monster High: Kowa-ike Girls.

Her most prominent and long-running role is that of 红林珠璃 (Juri Kurebayashi) in the long-awaited Aikatsu! franchise. She first voiced the character in the main television anime in 2014 and has since reprised the role in multiple subsequent series, including Aikatsu Friends! and Aikatsu on Parade!, as well as in several theatrical films and video games based on the franchise. Her work in the Aikatsu! series stands as a significant achievement in her career, contributing to a major and popular media mix project.

In addition to these signature roles, Saitou's filmography demonstrates her versatility across a broad spectrum of productions. Her television anime credits include roles in major long-running series such as Naruto: Shippuden and Gintama, as well as in acclaimed titles like JoJo's Bizarre Adventure: Diamond is Unbreakable, Violet Evergarden, and KiraKira☆PreCure a la Mode. She has also lent her voice to numerous video games, including the character 嘉蒂 (Gadot) in Lightning Returns: Final Fantasy XIII, 二川美美 (Mimi Futakawa) in Tokyo 七姐妹, and various roles in titles like Dynasty Warriors 8: Empires and Granado Espada. Her work in foreign language dubbing, or "吹替," includes providing Japanese voices for characters in films such as The Body and the television series Homeland. Her career has continued steadily, with roles in series like Soaring Sky! Precure in 2023 and Princession Orchestra in 2025.