Lee Su-ji (Korean: 이수지; born March 20, 1998), also known mononymously as Suji and Halla, is a South Korean singer and actress. She debuted as a member of the South Korean girl group The Ark and later was a member of the project girl group UNI.T. She was also a member of Real Girls Project as part of her acting role in The Idolmaster KR.
