Yuki Yagi is a Japanese voice actress and singer from Osaka Prefecture, born on December 7. She is affiliated with the talent agency Production Ace and has been active in the entertainment industry since 2011. Her early work included a performance in a stage play at the Osaka Castle Summer Festival and serving as a narrator for the program AT-X Anime Ranking in 2014.

Yagi is known for several prominent voice roles in anime television series and films. She starred as Kanata Shinozaki in the comedy series My Girlfriend is Shobitch. She voiced the character Alien Pegassa in the 2018 animated film Kaiju Girls (Black) and later portrayed Hanako in the series Kemono Michi: Rise Up. One of her most recognized roles is Chocola in the Nekopara franchise, a role she also reprised for the 2020 television anime adaptation. In live-action cinema, Yagi appears as Futaba Ichijō in the 2022 Japanese supernatural comedy horror film Sadako DX, an installment in the Ring franchise.

In addition to her voice work, Yagi has contributed to theme music for several of her projects. She sang the ending theme song Ai no Himitsu as part of the musical quartet Puare for My Girlfriend is Shobitch. For Kaiju Girls (Black), she performed the opening theme Honseisō Kōshinkyoku as a member of the unit Black Stars. She also performed the opening theme Shiny Happy Days for the Nekopara television anime alongside other cast members.

Yagi possesses special skills in baton twirling and piano, and she also holds a qualification as a librarian.