North Korean leader Kim Jong Un's younger sister Kim Yo Jong was promoted Saturday at a key meeting of the country's ruling party, state media reported. Kim Yo Jong's profile has been rising since 2014, when she was made deputy director of the Propaganda and Agitation Department of the Workers' Party. She and Kim Jong Un were born to the same mother, Ko Yong Hui. Like most members of the Kim clan, little is definitively known about Kim Yo Jong beyond her official rank. According to NK Leadership Watch, she is a close aide of her brother's "and since his accession manages his public events, itineraries and logistical needs, among other tasks."