Janet Waldo was an American actress with a prolific career in voice-over work, particularly known for her extensive contributions to animation from the 1960s onward. Within the context of anime, she is recognized for her voice roles in English-language adaptations of Japanese animated films and series produced during the 1970s and 1980s. She provided the voice for the character Princess, also known as Susan, in the 1978 American adaptation of the Japanese series Kagaku ninja tai Gatchaman, which was titled Battle of the Planets. Her work in this adaptation placed her within the broader landscape of early English-dubbed anime distributed to Western audiences.

Another notable anime credit in her career was the role of the West Wind in the 1983 animated fantasy film Unico in the Island of Magic. In this film, which features the adventures of a young unicorn, Waldo voiced the ethereal character of the West Wind in the English-dubbed version, a role that is frequently cited as a key example of her anime voice work. These roles are part of her larger body of work, which was primarily centered on American television animation, where she was a staple performer for Hanna-Barbera Productions for several decades. Her career was marked by a distinctive vocal quality that made her a frequent choice for characters ranging from teenagers to whimsical figures.