Bonjour,
First of all, the character that catches the eye the most is the one in the center. It's a person dressed entirely in black. We can guess that it's a witch. She has a cold and determined gaze. She represents someone dark, and mysterious.
Then, to her right, we can see a young man. He is also dressed all in black, and keeps his eyes downcast. He seems to be a mysterious person, too. He is a little in the shadow of the witch.
Finally, on the left, there is a young woman with blond hair. She is dressed in blue and has a crown. We can assume that she is a princess. She looks naive and kind. She is very bright, and embodies youth and joy of living.
So, the witch embodies determination and evil, the young man embodies mystery and shadow, and the girl embodies purity and light.
En espérant t'avoir aidé,