- Full Name: Ham Eun Jung (함은정)
- Date of Birth: Diciembre 12, 1988 (1988-12-12)
- Position: LIDER, Lead Vocalista, principal rapera
- Full Name: Park Sun Young (박선영)
- Date of Birth: Mayo 30, 1989 (1989-05-30)
- Position: Vocalista, Rappera
- Full Name: Park In Jung (박인정)
- Date of Birth: Octubre 5, 1987 (1987-10-05)
- Position: pincipal Vocalista
- Won Gold in 2005 CMB ChinChin Music Festival competition.
- Former SM trainee, left shortly before debut due to personal reasons.
- Regular Cast Member on 2009 Variety show "Invincible Baseball"
- Full Name: Park Ji Yeon (박지연)
- Date of Birth: Junio 7, 1993 (1993-06-07)
- Position: Vocalist
- Full Name: Lee Ji Hyun (이지현)
- Date of Birth: Diciembre 12, 1986 (1986-12-12)
- Position: Sub Vocalista
- Appeared in 2009 drama Queen Seon Duk.