Without being able to see the specific image you are referring to, it is difficult to determine the exact element of art used to create emphasis on the girl. However, a common element that is often used to create emphasis in an image is color. Using bold, contrasting colors for the girl compared to the rest of the image can draw the viewer's attention towards her. Additionally, composition techniques such as placing the girl in the center of the frame, using leading lines towards her, or framing her with other elements can also create emphasis.
