But cyberattacks and other forms of assault were a big point of fearful contention prior to the games in South Korea as tensions with long-time, adjacent adversary North Korea and much of the diplomatic world have become even more strained.
While internet and wifi were affected across the Olympic site - spread over two main venues in mountainous eastern South Korea - organisers said there was no impact on competition, which got into full swing on Saturday.
That's what makes Saturday's meeting so rare: Not only is Kim Yo Jong in the South for the first time ever, but she's chatting with South Korea's president inside the Blue House (South Korea's White House, so to speak).
U.S. Defense Secretary Jim Mattis says it's too early to tell if any of the overtures between North and South Korea during the Olympic Games are creating a chance for peace on the Korean Peninsula.
"We don't want to speculate because we're still trying to find out what the root source is", said Nancy Park, a spokesperson for the Games organisers.
Another demonstrator shouted: 'Having these red communists in the heart of Seoul is an utter humiliation!'
During an intermission, South Korean rappers Dynamic Duo took to a stage and worked up excited young South Koreans around them with a version of Mark Ronson's "Uptown Funk". This would be the first summit between the two Koreas in over a decade.
Meeting ends between SKorean leader, N. Koreans
Attention is on how much Moon will urge the North to improve inter-Korean ties and to abandon its nuclear and missile programs. As the opening ceremony began, she and South Korean President Moon Jae-in exchanged a historic handshake and spoke briefly.
Kim Jong-Un's influential sister Kim Yo-jong, who made a surprise appearance at the Olympic opening ceremony, may also come along.
The formal meeting between Moon and the delegation was held the day after the two nations' athletes marched under a unified flag at the opening ceremony of the Olympics on Friday.
And while Moon could not miss the chance to "lower the temperature in the room" by engaging with Kim during her visit for the Olympics, her public relations blitz could subject the South Korean president to criticism that "he fell for a charm offensive", Kang said.
For their part the Southern members include three naturalized Korean - Pak Caroline-Nancy, Im Danelle and Griffin Randi-Heesoo - all of who were invited to take up citizenship after being offered a place in the national hockey squad.
And there's even more intrigue: It appears that she brought a folder with her into the meeting. "They have people hungry in North Korea".
The joint Korean team made its historic Olympic debut on Saturday, but suffered an 8-0 loss to the Swiss at Kwandong Hockey Centre in Gangneung, Gangwon Province, the sub-host city for all ice sports at the PyeongChang Winter Games, reports Yonhap news agency.
Officials in Tokyo suspect the North is trying to chip away at the united front that groups the USA together with its East Asian allies amid biting global sanctions on the hermit country.