Birth Name: Lee Soo Mi (이수미)
Birthday: March 3, 1989
Position: Leader, Lead Vocalist
Former member of group SeeYa also the leader of Co-Ed School
Birth Name: Heo Chan Mi (허찬미)
Birthday: April 6, 1992
Position: Main Vocalist
Former SM trainee and ex-member of the project group that would become Girls’ Generation
Birth Name: Ryu Hyo Young (류효영)
Birthday: April 22, 1993
Position: Main Rapper, Sub-Vocalist
Her twin sister Hwayoung is from the group T-ara who is also a rapper
Birth Name: Jin Hye Won (진혜원)
Birthday: March 6, 1995
Position: Lead Rapper, Vocalist, Lead Dancer
Birth Name: Seo Eun Kyo (서은교)
Birthday: March 21, 1995
Position: Vocalist, Main Dancer, Rapper
Joined on December 31st 2010 as the 5th member.Former JYP trainee.