Smile Soomi (미소수미)
- Birth Name: Lee Soo Mi (Hangul: 이수미)
- Birthday: March 3, 1989
- Position: Leader, Lead Vocalist/ Rapper
- Former member of group SeeYa also the leader of Co-Ed School.
Star Light Chanmi (별빛찬미)
- Birth Name: Heo Chan Mi (Hangul: 허찬미)
- Birthday: April 6, 1992
- Position: Main Vocalist/ Rapper
- Former SM trainee and ex-member of the project group that would become Girls' Generation.
One Light Hyoyoung (한빛효영)
- Birth Name: Ryu Hyo Young (Hangul: 류효영)
- Birthday: April 22, 1993
- Position: Main Rapper, Vocalist
- Her twin sister Hwayoung is from the group T-ara who is also the lead rapper.
One Star Hyewon (한별혜원)
- Birth Name: Jin Hye Won (Hangul: 진혜원)
- Birthday: March 6, 1995
- Position: Vocalist/ Lead Rapper
Eun-kyo (은교)
- Birth Name: Seo Eun Kyo (Hangul: 서은교)
- Birthday: 1995
- Position: 2nd Main Vocalist/ Maknae
- Joined on December 31st 2010 as the 11th member
