GHOST9 (Korean: 고스트나인; Japanese: ゴーストナイン) is a boy group formed by Maroo Entertainment that originally consisted of nine members: Junhyung, Shin, Kangsung, Junseong, Prince, Woojin, Jinwoo, Dongjun, and Taeseung. A few of the members were already familiar to the public for their participation in different survival shows as trainees. Members Woojin, Jinwoo, and Taesung also used to promote as a trio called TEEN TEEN. The nine-member group made their official debut in September 2020 with the EP "Pre Episode 1 : Door."
In September 2021, Maroo Entertainment announced the departure of Taeseung and Dongjun from the group.
In 2023 they participated in Peak Time survival show as Team 14:00 and advanced to the 3rd (semi-final) round.
Korean: 이신
Japanese: すね
Korean: 준형
Korean: 강성
Japanese: カンソン
Korean: 준성
Korean: 프린스
Korean: 우진
Japanese: ウジン
Korean: 진우
Japanese: ジヌ