This is an excellent piece overall. Excellent work on the colors and shading, the proportions and placement are all spot on, and you've got that great selection for a background that adds even more of a personal touch.
But there's one thing that just derails my mind on this for some reason. It's the noses. I know it's an odd thing to point out, especially for me. It's just... well, everything else is so detailed. The hair, the clothes, the eyes, even that ear... but then the noses lack that level of detail. I think maybe they need nostrils.