Yui Hasegawa is a Japanese voice actress and musical theater performer from Kanagawa Prefecture, born on October 16. She is affiliated with the talent agency Holy Peak.

In anime, Hasegawa is known for the role of the Kitsune-miko (Three Miko's Kitsune-miko) in the 2012 series Sengoku Collection. Her other animation credits include a doctor in Phantasy Star Online 2: Episode Oracle and the voice of Andrea in the Japanese dub of Lego Friends. She appeared as herself in a making-of video for the production Uchi no Natsu Fesu 2014! and voiced the character RIKO in the 2018 game Song of Memories.

Beyond voice acting, Hasegawa has an extensive career in stage musicals. She was the third actress to play the role of Viluy and the fifteenth actress to play Rei Hino (Sailor Mars) in the Sailor Moon musicals. She performed as Sailor Mars in The Super Live and was a guest performer at the 30th Anniversary Musical Festival -Chronicle- in 2022, alongside other actresses from the production. In 2025, she performed as Kurosawa Matsuri in the stage musical adaptation of Cherry Magic! The Musical.