Angela Costain is an English-language voice actor known for her work in anime dubbing, particularly during the 1990s. Her most prominent and frequently documented role is voicing the character Nabiki Tendo in the anime series Ranma ½. She provided the voice for this character across multiple formats, including the original television series, various original video animations, and the feature films. Notably, she is credited as Nabiki Tendo in the film Team Ranma vs. The Legendary Phoenix.

Beyond her signature role in Ranma ½, Costain voiced a wide array of additional characters within the same series, demonstrating her range as a voice actor. These roles included recurring friends of Nabiki, such as Yuka and Ryonami, as well as numerous incidental characters like students, announcers, and townspeople. Her voice work also extended to other anime projects, including the role of Alice in the series Funky Fables.

Her contributions to English-dubbed anime are consistently documented in closing credits and animation news resources, placing her among the cast of voice actors involved in localizing popular Japanese series for international audiences during that era. The consistent documentation of her work, especially in the extensive Ranma ½ franchise, confirms a sustained engagement with anime voice production.