WASHINGTON — When the sister of Kim Jong-un made her historic visit to the Winter Olympics in South Korea two weeks ago, saying nothing but commanding noisy press coverage, the South Korean news media quickly called her “North Korea’s Ivanka.”

Now, President Trump is sending the real Ivanka.

The question is whether Ms. Trump, with her fashion industry glamour, can counter the news media narrative set by a mysterious North Korean woman, Kim Yo-jong, who is a director of her totalitarian government’s propaganda and agitation department.

White House officials recoil at any parallel between the dictator’s sister and the president’s daughter. But the comparison is obvious, if invidious, given their family pedigrees.

And Ms. Trump may benefit by another comparison: to Vice President Mike Pence, who sat near Ms. Kim during the opening ceremony of the Olympics and seemed unable to strike the same chord as she did with South Koreans. He later missed out on a meeting with North Korean officials after they canceled at the last minute.