An image from Unpretty Rapstar, one of the productions that also features DOI.
DOI
October 21, 2008 — Ansan, South Korea
Kim Do-yi, known mononymously as DOI, is a South Korean singer and lyricist under Chapter-I. She is a member of the girl group H//PE Princess, formed through the 2025 survival show Unpretty Rapstar: HIP POP Princess.