After her first public appearance, South Korea’s spy service told lawmakers that it assessed the girl pictured is Kim’s second child, who is about 10 and whose name is Ju Ae. The National Intelligence Service said her looks matched information that she is taller and bigger than other girls of the same age. It also said that her unveiling appeared to reflect Kim’s resolve to protect the security of North Korea’s future generations in the face of a standoff with the United States.