Not sure if this has been posted. Kim's sister seems to play a major role.

She organises Jong-un’s public appearances and works as his political adviser.

Until last week, when she was named an alternate member of the Politburo, her official role was as vice-director of the North’s ruling Workers’ Party’s propaganda and agitation department.

https://www.irishtimes.com/news/world/asia-pacific/kim-yo-jong-north-korea-s-most-powerful-woman-1.3253621?mode=amp