GAIA (Formerly known as Gen-Z) is a 4-member pre-debut girl group under AXIS Entertainment. The group consists of: Rina, Rosa, Nairu and Mari. They will debut sometime in 2021. On February 26, the CEO of AXIS posted on his Instagram account a profile photo of the company's new 5-member girl group. On the following day, a teaser video was published and along with it, the name of the group, Gen-Z. Weeks later, on March 16, the profile photos of the members were also posted on his Instagram. Kurumi and Seunghee left sometime in mid 2020 and Rina's sister Mari joined the group.