“Guo Jia Jia” (郭嘉佳), or better known by her stage name “Jia” (지아) is a Taiwanese singer currently under TR Entertainment and a member of the girl group TRI.BE.
2020–2021: Debut with TRI.BE
On August 28, 2020, Jia was officially revealed as the third member of TRI.BE. The group is set to debut sometime in February 2021.
Source: tri.be fandom