Rainbow BLAXX Members Profile: Rainbow BLAXX Facts Rainbow BLAXX (레인보우 블랙) is a South Korean four member girl group and the 2nd sub unit from girl group Rainbow that debuted on January 20, 2014 under DSP Media with the single “Cha Cha”. It consisted of Jaekyung, Woori, Seung Ah and Hyunyoung. They were the counterpart … Continue reading Rainbow BLAXX Members Profile