Kim Yo-jong was caught on camera peeking from behind a wall as Kim Jong-un and Donald Trump were taking a stroll around the garden of the Sofitel Metropole Hotel, accompanied only by their interpreters.
Yo-jong, dubbed North Korea's most powerful woman, was apparently checking to see whether she was at a distance respectful enough; she then followed behind Kim and Trump as reporters looked on.
This is not the first time she came into spotlight this week. During the North Korean delegation's three-day trip to Hanoi, she was seen holding an ashtray for her brother as he was having a cigarette break at a train station in China.