Kim Yo-jong, the sister of Kim Jong-un to attend the Olympics
According to several South Korean news sources, she will be in the South on Friday, along with other high ranking North Korean officials.
Yo-jong has risen quickly through the ranks of North Korean government and is presently the Deputy Chief of the Propaganda and Agitation Department
from yonhap news:
http://english.yonhapnews.co.kr/northkorea/2018/02/07/0401000000AEN20180207013500315.html
Kim Jong-un's dear sister, Kim Yo-jong, is set to become the first member of North Korea's ruling dynasty to set foot in the rival South this week.
The Unification Ministry in Seoul announced Wednesday that Kim Yo-jong, presumed to be aged about 30, will be part of a high-ranking government delegation attending the Winter Olympic opening ceremony slated for Friday.
The team will be led by Kim Yong-nam, the nominal head of state. Kim Yo-jong is widely believed to be powerful and close enough to the leader to directly represent his views.