The group consists of six members: Songsun, Kelly, Hyunbin, Jia, Soeun, and Mire.

[citation needed] Kelly was a contestant on the Chinese competition show Youth With You 2 under TRI.BE's former pre-debut management company Lion-Heart Entertainment.

The group released teaser and promotional videos in early February, later confirming that they will be debuting later that month.

[6] On the same day as their debut, Tri.be was announced to be signed under Universal Music's subsidiary label Republic Records for promotions outside of Korea.

[9] On December 2, 2021, it was announced Tri.be would be participating in the theme song for Cartoon Network's series We Baby Bears.