Cignature (Korean: 시그니처; commonly stylized in all lowercase) is a South Korean girl group formed by C9 Entertainment and managed under their sub-label J9 Entertainment, which was set up to specifically manage girl groups. The group made their debut on February 4, 2020 with their debut single "Nun Nu Nan Na". Originally debuting as a 7-member group, Ye Ah and Sunn left the group on April 27, 2021 for undisclosed reasons. On June 14, 2021, J9 Entertainment revealed the addition of two new members, Chloe and Dohee.