Despite the thaw in ties between the two Koreas, Washington has said it will maintain its campaign of "maximum pressure" on Pyongyang, and insists there are no differences with Seoul on how to handle the North.
The new US sanctions will be announced while Trump's daughter, Ivanka, is visiting South Korea.
"Even if she does not carry messages from her father, her remarks can give a clue to grasping what the Trump administration really thinks".
The progressive Seoul government's decision to overlook Kim's combative past has drawn fierce criticism from conservatives in South Korea.
The 36-year-old businesswoman and former model will be joined by press secretary Sarah Sanders and is going in part because "she is something of a winter sports enthusiast", an official said.
The family connections will be reversed at Sunday's closing ceremony.
For now, there are no signs that Ivanka will meet him at the ceremony.
Acknowledging public angst over Kim Yong Chol's pending visit, Baik said the South's stance that the Cheonan sinking was instigated by the North has not changed.
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Ahead of Pence's visit, Trump officials had insisted they'd requested no meeting with North Korea, but notably left open the possibility one could occur.
On the basis that the delegates ate eight meals during their two and a half day stay, the food cost averages 284,000 won per meal per head, or $261.
The Ministry of Unification spent around 130 million won on accommodation and 50 million won each for transport and food, the official said.
There are no indications that Ivanka Trump will meet Kim Yong Chol, vice chairman of North Korea's ruling Workers' Party Central Committee, who is to lead the North's delegation to the closing ceremony.
Vice President Pence sat just a row away from the younger Kim and other senior North Korean officials at the opening, but did not exchange a word with anyone from the delegation.
A potential high-level interaction between the USA and North Korea, which would have broken years of estrangement between the two countries, loomed prominently over the Winter Games, where North Korea made a last-minute move to send its athletes to compete on a combined team with South Korea, the host of the games.
He is a controversial figure - and his upcoming visit has been met with hostility in South Korea.
The party's statement also said that Kim Yong-chol deserved "death by beating" and called on the government to block the visit.