Kanoko Sudō is a Japanese actress and voice actor affiliated with Toho Entertainment and in a business partnership with Breathe Arts. She was born in Kanagawa Prefecture on January 20, 1997. Her career began after she was scouted by a manager from Toho Entertainment while performing in a musical, which she had started as an extracurricular activity. Initially, her work was centered on film and television drama, but she was frequently complimented on her voice on set, which led her to pursue voice acting. Around this time, she learned about the private school run by voice actor Megumi Ogihara at Breathe Arts from Kaede Yuasa, which facilitated her entry into the world of voice acting. Sudō graduated from the musical course at Senzoku Gakuen College of Music in 2019.

In anime, Sudō is known for her role as Airi Kojō, the president of the a cappella club in the mixed-media project Utagoe wa Mille-Feuille (Harmony of Mille-Feuille). This role is part of a larger project that includes music videos, audio dramas, and a 2025 anime television series, where her character is a central figure in the story of high school girls finding harmony through a cappella singing. Her other notable voice roles in anime and games include Wonder Acute in the popular multimedia franchise Umamusume Pretty Derby, as well as roles in Caligula2, Battle Spirits Connected Battlers, and takt op.. Her filmography also includes earlier live-action work, such as a role in the Ultraman R/B television series and its subsequent film. Her entry into the entertainment industry was through live-action performance, with her voice acting career developing alongside her work in television drama and film.