Ko Woo Ri

Using the stage name Woori, she debuted as a member of Rainbow on November 14, 2009 with the group's first mini album Gossip Girl. On January 20, 2014, she debuted as a member of Rainbow's second sub-unit, Rainbow Blaxx, with the special album RB Blaxx. On October 28, 2016, DSP Media announced that Rainbow would be disbanding after seven years after all of the members decided not to renew their contracts with the agency.

On March 2, 2017, Imagine Asia (then known as Wellmade Yedang) announced that Woori had signed on with the agency, where she would focus on her acting career. On January 9, 2018, it was reported Woori had legally changed her name to Go Na Eun. In 2019, Rainbow reunited to celebrate their 10th anniversary since debut with the special single album "Over The Rainbow".