WM Entertainment
Leader, Vocals, Lyrics Composer
Blood Type: B , Twitter: @BARO920905
Vocals, Maknae
Blood Type: A , Twitter: @SANDEUL920320
Vocals, Rap
23rd April 2011 on MBC Show! Music Core
Blood Type: A , Twtter: @B1A4_JINYOUNG
Main Rapper
Blood Type: A , Twtter: @B1A4_gongchan
Main Vocal
Blood Type: A , Twtter: @B1A4_CNU