dna and his vision for the repressive regime. she's now heading across the south korean border as part of north korea's delegation to the winter olympics. >> oh, it's absolutely significant on quite a number of levels. first, just the symbolism and symbolics of this. she has been relatively cloistered outside of north korea. we don't know how much she has traveled, but she's about to emerge on the world's largest television stage. >> reporter: kim yo-jong will be the first member of the kim dynasty to ever visit south korea. no family member has crossed the border since the korean war. her star has risen meteorically over past four years. she's been a top official of the propaganda and agitation department which enforces censorship. she was recently promoted to a position in the politburo, the senior body in the communist party. kim yong-nam, ceremonial head of state, will be there and yields influence in the regime.