For the rendering, you could probably play around with adding in more hard edges, and balancing soft and hard edges. (Sinix has some good videos that go into that if you’re interested). You do that a little bit though with the purple shading on the arm and ear, which I am a big fan of, love the color choice. Looks great. Also might be interesting to experiment with using some different brushes that aren’t as blurry.

As a recomendation, always try several ones. With each element of your story. Then you will have more options or at least the best ones as final thumbnails.