Yukiyo Fujii is a Japanese voice actress and actress affiliated with Aoni Production. She was born on May 8, 1985, in Kanagawa Prefecture.

Her path to voice acting was unconventional. During junior high school, she was a member of the drama club but initially lacked the confidence to pursue acting professionally. After graduation, she worked as a stage lighting technician, a role for which she holds a certified skills qualification. She later participated in the Miss International Japan beauty pageant, becoming a finalist in 2008. This led to her joining the agency Aoi Corporation, where she worked as a television actor before transitioning to voice work. Her motivation to focus on voice acting grew from the rewarding experience of providing voices for children's programming. In April 2011, she moved to her current agency, Aoni Production, to further her voice acting career.

Fujii's first leading role in an animated work was as the title character in the 2013 film Patema Inverted. Her clear and versatile voice has allowed her to portray a wide range of characters. She is known for roles such as the gentle park manager Latifah Fleuranza in Amagi Brilliant Park, the androgynous and playful Tetra in Log Horizon, and the heiress Rebecca Rossellini in Lupin the Third: Part IV. She has also taken on the iconic role of Hotaru Tomoe, also known as Sailor Saturn, in the Pretty Guardian Sailor Moon Crystal series and its subsequent films. In the long-running GeGeGe no Kitarō, she voiced the human protagonist Mana Inuyama.

Her film work includes a role as Kyōko in the critically acclaimed I Want to Eat Your Pancreas. In the world of video games, Fujii is well-known for her portrayal of Megumi Tokoro in The Idolmaster Million Live! series. Her other game roles include Kayoko Onikata in Blue Archive, Serri Glaus in Atelier Ryza 2, and Tazuna Hayakawa in the Uma Musume Pretty Derby franchise.

Among her many television anime roles, Fujii has also played Sister Ivry in Edens Zero, Himiko Agari in Komi Can't Communicate, and Telolilo Lilili Lu in the comedy series Fantasy Bishōjo Juniku Ojisan to. Her repertoire extends to diverse characters such as Mimi Pearlbaton in Re:Zero − Starting Life in Another World, Krulcifer Einfolk in Undefeated Bahamut Chronicle, and Harumi Taniguchi in Citrus. She has also been a part of major franchises like Fairy Tail, One Piece, and A Certain Scientific Railgun.