“Bang So Eun” (방소은), or simply known as “Soeun” (소은) is a South Korean singer currently under TR Entertainment and a member of the girl group TRI.BE.
2020–2021: Debut with TRI.BE
On September 2, 2020, SoEun was officially revealed as the fourth member of TRI.BE. The group is set to debut sometime in February 2021.
Source: tri.be fandom