She is one of the reclusive leader's closest advisers and met with Moon at the presidential Blue House in the capital, Seoul, on Saturday in the highest-level contact between the two Koreas in years. Back at the athlete's village, they bunk with their respective countries.
Against the background of the Winter Olympics in PyongChang, North and South Korean leaders are planning to meet for the first time in over a decade, Seoul announced on Saturday.
Tensions in the Korean peninsula have cooled down in recent weeks thanks to the North Korean regime's decision to send its athletes to take part in the Olympic games.
On his way to Asia earlier this week, the U.S. vice president told reporters he was not seeking direct talks with North Korean officials, "but we'll see what happens".
Already there have been concerns that North Korea's overture of the sports diplomacy is an indirect attempt by the regime to wedge a rift between the US and South Korea.
Moon urged Pyongyang to actively seek an "absolutely necessary" dialogue with Washington, he said.
"We are investigating the cause and we will share more information".
The recent detente, anchored by South Korea's hosting of the Winter Olympic Games that began on Friday, came despite an acceleration in the North's weapons programmes a year ago and pressure from Seoul's allies in Washington.
They expressed scepticism on the prospects for a summit, with professor Koh Yu-hwan of Dongguk University not expecting one "in the foreseeable future". "Moon has been very accommodating to North Korea's desire to join the Olympics late, and that has been seen as deeply unfair". "The North is not interested in talks on denuclearisation".
The ex-North Korean officer says members of the delegation will also be expected to inform on each other.
Fans roared every time a Korean got the puck on her stick and Han Soojin almost put the team on the board with a shot from the left circle that hit the crossbar early in the first period. "It's not unfamiliar", Kim said when asked by one of the South Koreans at the dinner how she feels on the other side of the border.
In a historic meeting between South Korean President Moon Jae-in and Kim Jong Un's younger sister, Kim Yo Jong, the South Korean leader was presented with an invitation to visit their reclusive neighbor state to the North.
The official said Pence and South Korean President Moon Jae-in, while watching speed skating together on Saturday night, discussed intensifying sanctions.
Pence said Friday that the US would oppose talks between the two Koreas until the North agreed to open negotiations on ending its nuclear program.
Before the ceremony, Pence went around a table and shook hands with each and every person seated there except Kim Jong-un's sister.
The North Koreans, wearing full-length red jumpsuits and arranged in tidy rows on each side of the rink, at times competed for the crowd's attention against mini-skirted dancers from the South, dressed completely in black and knee-high boots. "The world cannot turn a blind eye to the oppression & threats of the Kim regime".
But if Pyongyang plays ball, the Trump administration will be put to an unavoidable choice between sitting down with the Kim regime under what are sure to be imperfect circumstances or sticking to its demands and further alienating the Moon government.