Nikki Dial, born Nicole Grenier, is an American former adult film actress who also provided voice acting for English-dubbed hentai anime during the 1990s. Her career in adult entertainment began at the age of eighteen, and she appeared in over seventy films between 1991 and 1996, working for major studios such as Legend, VCA Pictures, and Vivid. She received several industry accolades, including the XRCO Award for Starlet of the Year in 1992 and the F.O.X.E. Award for Female Fan Favorite in 1994, and was inducted into the XRCO Hall of Fame in 2008 and the AVN Hall of Fame in 2024.

Dial's voice acting work was a side venture during her time in the adult film industry and shortly after her retirement from performing in 1996. She contributed English dub voices for characters in hentai anime, a genre of animated pornography. A notable example of this work is her role in the series Words Worth, produced by NuTech Digital. In a 2002 interview, Dial described the experience as her first time dubbing and noted that it involved matching breaths and moans to the on-screen action. She also mentioned working alongside fellow adult film star Jenna Jameson on this project. This voice acting role is the most prominently documented example of her work in anime, representing a distinct but brief chapter in her career following her departure from performing in live-action films.