Ji will be among the group at the White House on Friday.
And he praised Mr Trump for "sending out a warning" when he spoke of human rights violations in North Korea.
Though Cha is widely respected in his field, his candidacy was reportedly scuttled after it was revealed that he disagreed with the Trump administration's consideration of striking North Korea in a "bloody nose" attack - a limited strike meant to send a message to the regime - and had reservations to Trump's stance on the U.S.' "horrible" trade deal with South Korea, which the president called unfair and proposed scrapping.
"You put the spotlight on North Korea's human rights issues in front of the entire South Korean National Assembly, and refreshed the attention on these kind of issues", she said, adding that she could not thank the president enough.
McMaster reportedly favors launching a "bloody nose" strike to get North Korean dictator Kim Jong Un to freeze his nuclear program, while Mattis and Tillerson are anxious that even a limited attack could explode into full-scale war, according to the Times and other media outlets.
Ricardo Colon, a Diplomatic Security official, said the service would have about 100 personnel in South Korea, working from the U.S. Embassy and the Olympics venues.
Trump's administration has said that it is continuing that policy. But so far, it has stopped short of taking military action against the North.
O'Brien, who has ties to the Trump administration, according to the analyst, also was considered previous year for the role of US Secretary of the Navy. Shelters for missile launchers and other heavy equipment were erected several weeks ago and some may already be hidden from view inside, it said. "It could reduce the incentive to negotiate and potentially undercut efforts [of cooperation] with China".
The White House is pushing top Pentagon officials to present strategies regarding North Korea. Ji lost a leg and an arm while scavenging coal as a boy, and later fled to South Korea.
An estimated 3,600 additional USA service members were deployed to join the 28,000 United States troops already based in South Korea during last year's drills, which included ground, air, naval and special operations field exercises.
"Today, he has a new leg".
Known as the "Girl with Seven Names", she changed her name frequently in China to escape arranged marriages, brothels, and police eager to repatriate her.
A dozen North Korean female hockey players came last week to form a joint team with South Korean athletes, the first unified Korean team in the Olympics.
North Korean flags also flew during the 2014 Incheon Asian Games, the last time the North sent a big delegation to a sporting event across the border.
The president indicated his patience remains limited regarding North Korea's activities.
But beyond establishing the US's moral high ground in the North Korean crisis, or simply making a point in a speech, Ji said that Trump standing up for those oppressed by the Kim regime could have a powerful effect on politics in Pyongyang. Friday's meeting was announced in the president's schedule. North Korea's rights rights record is heavily criticised by both the United States and the United Nations, and it is estimated to have up to 120,000 political prisoners in its sprawling gulag system.
The US is "not kidding" about launching a targeted strike against military targets in Kim Jong-un's prison state but such an attack could spark all-out war, Korea expert Sue Mi Terry warned.