No Eul

No Eul debuted as a member of Rainbow on November 12, 2009 with the group's first mini album Gossip Girl. On October 28, 2016, DSP Media announced that Rainbow would be disbanding after seven years of activities after all of the members decided not to renew their contracts with the agency. On November 13, 2017, A'Pik Entertainment announced that No Eul had signed with the agency, where she will focus on activities as an actress.

On September 3, 2019, it was announced that No Eul had signed Good Luck Entertainment as a singer and actress. In 2019, Rainbow reformed to celebrate their tenth-anniversary since debut with the special single album "Over the Rainbow".