It is claimed Kim Yo-jong has become ever more powerful in North Korea as speculation over her brother's potential health problems mount after he missed his grandfather's anniversary event last week

Dictator Kim Jong-un’s little sister is fast becoming his “alter ego” and is tightening her grip on the country, the world has been warned.

Kim Yo-jong, the North Korean leader’s 31-year-old sibling, has many of the same traits as the tyrant, according to top political commentators.