Iori Saeki (佐伯 伊織 ) also known by the stage name NU-KO, is a Japanese singer and voice actress affiliated with Swallow. Beginning her activities as a dōjin (self-published) musician in 2012, she began voice acting activities in 2018. She is known for her roles as King Halo in Uma Musume Pretty Derby, Maiko Kurashiki in Hachigatsu no Cinderella Nine, and Kimie "Tanpopo" Kamata in Oresuki.