Kim Yoon-sung, known professionally as Gaeko is a South Korean rapper. He and Choiza comprise the hip hop duo Dynamic Duo, which rose to fame upon the release of their debut album Taxi Driver in 2004. In 2015, he released his first solo album, Redingray.

Kim Hae-sol, known as Zion.T (Korean: 자이언티), is a South Korean hip hop and R&B singer signed to The Black Label, a subsidiary label of YG Entertainment managed by Teddy Park and Kush. He has released a studio album, Red Light (2013) and two extended plays. He has also been featured on tracks by well-known K-pop artists such as G-Dragon, Zico, and Psy.