I don't think anyone knows that much about her. A few years ago libs learned that she exists during one of the many "Kim Jong-un is dead!" cycles they regularly go through. As such, they promptly set about inventing a character for her as the "even crazier, even more evil sister of the dictator!"

Your dad read one of these articles full of stuff some guy in America made up and then parroted it half-remembered to you.