Yuuki Sanpei is a Japanese voice actor born on August 17, 1988, in Tokyo, Japan. He is an associate member of the talent agency Kenyu Office. His career in voice acting began in the 2010s, and he has since built an extensive body of work, primarily in supporting and ensemble roles across a wide range of anime series.

Sanpei's early anime credits include minor roles in major franchises such as Attack on Titan and Gintama. Over the years, he has become a prolific character actor, lending his voice to numerous figures in popular series. His notable roles include Kazuo Kinoshita in Rent-a-Girlfriend, Victory in Edens Zero, Jonas Wellman in SPY x FAMILY, a zombie in Chainsaw Man, Foreman in Frieren: Beyond Journey's End, and a government employee in Jujutsu Kaisen. In the series Ninja vs. Gokudo, he provides the voice for the character Zanzō Kasai. Beyond anime, his voice acting work extends to video games, where he is known for providing the Japanese voice of Sova in Valorant, and he has also contributed to titles such as Nier Replicant and Octopath Traveler II.

Throughout his career, Yuuki Sanpei has collaborated with a wide array of production studios and has appeared in multiple series from long-running franchises like Fairy Tail, Detective Conan, and Black Clover. His achievements are characterized by his consistent presence in the industry and his versatility in portraying a vast range of characters, from townspeople and officials to monsters and villains.