Meet North Korea’s mysterious ‘princess’ Kim Yo Jong — the 30-ish sister of Kim Jong Un who just shared a historic handshake with South Korea’s president

Kim Yo Jong, sister of North Korean leader Kim Jong Un, on April 13, 2017.REUTERS/Damir Sagolj

In a rare show of diplomacy between the two Koreas, Kim Jong Un’s younger sister traveled to South Korea on Friday for the opening ceremony of the 2018 Winter Olympics in Pyeongchang.

Her journey is considered a milestone of historic significance — she was the first member of North Korea’s ruling family to visit the south since the Korean War in the 1950s, according to The New York Times.

Like her brother, and much of the rest of their family, few details are known about Kim Yo Jong and the life she lived before reaching a prime leadership role in the North Korean government.

Here’s what we know about her so far: