If you want to know if someone is "real" tell them an obvious lie. A human will recognize it for what it is immediately, a cursed will not. They may look real, but they are not. Only real eyes realize real lies.
Das Unschuldige Mädchen, dass ich war, ist tot, ich töte sie, weil sie in dieser Welt nie überleben würde / The Innocent Girl that I was is dead , I kill her because she would never survive in this world