JIYU is a South Korean singer and member of KiiiKiii under STARSHIP Entertainment. Born Seo Ji-yu on May 14, 2006, she debuted with the five-member group on March 24, 2025, with Uncut Gem.

JIYU is the group’s leader. A Rolling Stone interview introduced her as a vocalist and rapper and included her perspective on balancing the demands of the group’s early career.

Her recording career includes KiiiKiii’s “I DO ME,” “DANCING ALONE” and “404 (New Era).” The group continued its releases with “Pop Off Pop Off” in August 2026. These songs provide an introduction to her work as part of the lineup, while the group page collects the official videos and shared career highlights.

Follow the official KiiiKiii channels below for releases, performances and member updates. The links are group accounts, and the Back link returns directly to the KiiiKiii profile.