Yuna Tamaki is a Japanese voice actress, stage actress, scriptwriter, and fortune teller born on April 28, 1990 in Ibaraki Prefecture, Japan. She originally performed under her birth name Satowa Tanaka before changing to her current stage name in 2016. Tamaki trained at the Hanayashiki Actors Studio and later continued her education at 81 Actors Studio, the training program operated by the agency 81 Produce. She became affiliated with 81 Produce as a junior talent in May 2011 and remained with the agency until November 2024, when she left to work as a freelance creator and performer.

As a voice actor, Tamaki has portrayed a variety of supporting characters across numerous anime series. One of her notable roles is Yukiko Kamakura in Duel Masters Victory V, though she also voiced the character Hako in the earlier series Duel Masters Victory. Her other anime credits include roles in Bakuman, Jormungand where she played Marine and Jano, Kill la Kill as Watari Masuyo and Choroma, and Pokémon Best Wishes as well as Pokémon XY. She has also appeared in My Love Story as a mother, Tokyo Ravens as a student, Detective Conan providing airport announcement voice work, Cardfight!! Vanguard G as a child character, Doraemon as a classmate, and The Mystic Archives of Dantalian as a maid. Additionally, she voiced Ariel in the Japanese version of the video game The Last Story.

Beyond voice acting, Tamaki has built a diverse career in live performance and creative writing. In 2012, she co-founded the theater group Hatsukoi Kikaku with Yuki Kobayashi, Yoshiki Nakashima, and Yukiko Hirayama, serving as the troupe's leader and writing scripts for their productions. She has also contributed scripts for television, notably for the program BREAK OUT. Her skills include kendo, karaoke, tarot card reading, and relative pitch, and she possesses a soprano vocal range. Since 2019, she has worked at the fortune-telling spot Fortune Salon Selene in Ikebukuro, Tokyo, applying her talents for tarot and divination.