DG (Diego Kang; 강다겸 Kang Dagyum) is a famous Korean idol and also the head of PTJ Entertainment, an idol training agency. He is one of Charles Choi's Ten Geniuses and has close ties with him. He used to be known as James Lee but discarded this identity. He is known as the legend of the 1st generation. During the 1st Generation, Charles Choi used DG to murder Gapryong Kim. This incident was completely hidden, according to Eugene, it was the incident with the murder of Baekho Kwon and Gapryong Kim