>>4333054The white dress blows out the image a little which makes the girl glow, isolating her perfectly from the girl to the right which is only slightly out of focus.
The girl is pretty and young, but the cigarette, posture, hair, expression and dark circles give her a worn adult character.
After looking at her, the eye wanders to the girl on the right, who also makes a gesture not that common for a child.
Now the eye goes to what the girl is looking at, being the boy on stilts in the background, who looks eerie, giving the image further character.