Hoping to discern what she's thinking, analysts pored over video of her eyes, and remarked on the tilt of her chin.
"Is it really that different from speaking to someone from another region in South Korea?".
Kim Yong Nam, the North's nominal head of state who was also at Saturday's meeting, said "even unexpected difficulties and ordeals could be surely overcome and the future of reunification brought earlier when having a firm will and taking courage and determination to usher in a new heyday of inter-Korean relations".
In an exclusive interview with NBC News' Lester Holt on the sidelines of the PyeongChang Winter Olympics, Warmbier said he did not find it hard seeing North Korean leader Kim Jong Un's sister enjoying the moment at Friday's Opening Ceremony.
At a Friday VIP reception for delegation leaders, Pence arrived late and stayed for just five minutes - and did not interact with the delegation from the North.
North and South Korea played in the same team for the first time in the women's ice hockey competition but were resoundingly beaten 8-0 by Switzerland on day one of the Pyeongchang Games. But rather than presenting herself as a stiff party operative, she has looked engaged and interested during multiple outings in Seoul, Pyeongchang and Gangneung.
Korean coach Sarah Murray, a 29-year-old Canadian, used three of the 12 North Korean players assigned to her team for the game - forwards Kim Un Hyang, Jong Su Hyon and Hwang Chung Gum.
As a way to support North Korean believers and to understand their hardship, pain and courage, Open Doors has asked Christians to live like a North Korean with their Lent resource of the same name.
She verbally conveyed Kim's invitation to Moon "to visit the North at his most convenient time", he added.
One telling incident came early.
The North Korean cheerleaders charmed the crowd with nostalgic oldies. Almost 200 female members of the North Korean cheerleading regime - a handpicked group created to be an appealing propaganda arm of the ruling party - chanted and sang (and did the wave on several occasions) while other fans clapped along in between Switzerland's offensive barrages.
After months of silence on whether it would even take part in the Pyeongchang Winter Olympics in the South, the Games have driven a rapprochement on the peninsula, while the North's athletes, performers and delegates have dominated the headlines.
The official said Pence and Moon did not discuss the North Koreans' invitation to Moon for a summit in Pyongyang, which would set the stage for the first meeting of Korean leaders in 10 years.
Hundreds of protestors gathered in Seoul on Sunday to vent their anger at what they called the "Pyongyang Games".
Despite favorable coverage in the South Korean media that largely ignored the horrors inflicted on North Koreans by Kim's regime, many ordinary South Koreans were skeptical of the North's motives.
Even if the costs of these concessions are worth the benefits-such as a literally peaceful Olympics and a de-escalation of tensions on the Korean peninsula-the benefits will probably be short-lived, according to Andrew Bertoli, a political scientist who studies the relationship between global sports, nationalism, and interstate conflict. Will Kim continue her role as a conduit between the two countries, outside of the headline-grabbing language of threats - and beyond the photo-op diplomacy of this weekend? It's anyone's guess as to when we might learn what's behind the facade.