One thing that immediately stands out to me is that the wings look disconnected from the character. First, they seem to be attached to her neck. Second, while her shoulders and torso are turned at an angle, the wings are facing the camera straight on.



Also, they look more furry than feathered, but maybe that was an aesthetic choice.



Wings are, above all, limbs. Check out some reference photos and tutorials on wing anatomy, and incorporate the wings into the character at the skeleton sketch stage. Once you have the underlying bones and muscle, it becomes much easier to pose them and place the feathers.



Obviously winged people are impossible, so don't worry too much about the physics or biology; but at a minimum, extra limbs should look like they are attached and have weight.