I didn't say she ran the show. She does the things her brother can't do without ruining his likeability. Everything she does is with his complete approval. She currently sits in the highest government position ever occupied by a woman and is in charge of all DPRK's propaganda (including her brother's public image) and she is the second in command, reportedly responsible for running the country when her brother is medically incapacitated. Kim Jong Un's kids are still too young to take power in his absence and if he dies before they come of age, Kim Yo Jong will rule in her brother's place.
Here is an article that states Kim Yo Jong called repeatedly for the collapse of the Joint Liason with South Korea office building before it suddenly...did.
https://www.npr.org/2020/06/16/877887300/in-terrific-explosion-north-korea-blows-up-liaison-office
I remember hearing all the boomer "take my wife...please! Ole ball and chain" jokes growing up. I fuckin love my husband. I love being married. I feel bad for people who think resenting their spouse is the default. I get to touch butt pretty much whenever I want.