高木紗友希 (Takagi Sayuki) is a Japanese pop singer. She was formerly an idol under Hello! Project as a member and sub-leader of Juice=Juice. She is also a former member of the SATOYAMA & SATOUMI movement unit Triplet. She was first introduced as a member of Hello Pro Egg at 2009 Hello! Project Shinjin Kouen 11gatsu ~Yokohama FIRE!~ on November 23, 2009. She left Juice=Juice and Hello! Project on February 12, 2021. Soon after, she terminated her contract with UP-FRONT PROMOTION.