> She normally spends her life in the background but Kim Jong-un's sister will be in the spotlight at the winter Olympics in Pyeongchang. Kim Yo-Jong will be part of the North Korean delegation attending the opening ceremony on Friday. Many know her as her brother's chief propagandist.
And last year North Korea's so-called princess was appointed a senior official at the ruling Workers Party. As Reuters' Josh Smith reports from Seoul, her visit south is a significant gesture from Pyongyang.>> For North Korea it underscores Kim Jong-un's message that he wants to be taken seriously. That he wants to change the dynamic on the Korean peninsula to one of reconciliation between the two countries.
For South Korea it will undoubtedly kindle hopes that the Olympics can be used to make a broader political and diplomatic breakthrough with the North.>> But the trip could mean trouble for US and South Korean relations, as Kim Yo-Jung was blacklisted last year by the US Treasury Department.
Her visit also raises concerns about whether Pyongyang is using the Olympics to push its own propagandist agenda.>> It's something that's likely to run into opposition from officials out of Washington who have said that they will come here to explicitly counter any efforts by the North Koreans to spread their message during the Olympics.
>> That's something the US Vice President Mike Pence reiterated when he touched down in Japan on Tuesday.>> We will not allow North Korean propaganda to hijack->> He's leading the US delegation, and his guest to the opening ceremony is the father of Otto Warmbier. The American student who died last year after being imprisoned in North Korea for 17 months.
Penn said on Wednesday that the US will soon unveil its toughest ever economic sanctions on North Korea.