TREI (TRiNiTiOPUS)(트레이) is a 3-member group under Banana Culture. The members consist of: Jaejun, Changhyun, and Juntae. They started as a duo on August 28th, 2017 and added another member on May 17th, 2018. They debuted on February 19th, 2019.
On June 19, 2020, it was announced that the group had disbanded after all the members had left the agency.