Kim Yo-jong: the sister of Kim Jong-un, fast 'becoming his alter ego'

From producing an ashtray during a cigarette break en route to a nuclear summit to issuing a statement in praise of the US president, Kim Yo-jong has become the single most important figure in the North Korean regime after her brother, the country’s leader, Kim Jong-un.

Since representing Kim at the 2018 Winter Olympics in Pyeongchang, South Korea, Yo-jong has not only acquired prestigious titles within the ruling Workers’ party. She is rumoured to be the brains behind Kim’s carefully constructed public image, at home and abroad. In return, she...