Sunni Westbrook is an American voice actress known for her work in animated series, video games, and English dubs of Japanese anime. She began her professional voice acting career in 1999, though she initially worked in other fields before committing to voice work full-time after relocating to Vancouver, British Columbia. She later returned to the United States, residing in Las Vegas, Nevada.

A significant portion of Westbrook's career is dedicated to English-language adaptations of anime. She is credited with the role of Koko in the anime special Jungle Emperor Leo, a title based on the work of Osamu Tezuka. Her other prominent anime dub roles include providing the voice of Pinoko for the 2017 English versions of Black Jack and Black Jack 21, as well as voicing Sōko Okita in the English adaptation of Gintama. She has also contributed to anime-influenced animated series, such as voicing Mika and Sue in LBX: Little Battlers eXperience.

In addition to her anime work, Westbrook is widely recognized for her portrayal of the character Cozy Glow in the animated series My Little Pony: Friendship is Magic during its eighth and ninth seasons. Her performance in this role earned her critical recognition within the industry, including nominations for two UBCP/ACTRA Awards for Best Voice and a Leo Award nomination in a similar category. Westbrook's voice work also extends to video games, with credits including Eleonora and Silke in Dragalia Lost, Kasha in Tooth and Tail, and Pakko in Gigantic. Her career demonstrates a recurring collaboration with the Vancouver-based voice acting community and Ocean Productions, which handles dubbing for many anime titles.