All right, first draft.
Made a few adjustments to Cartoons!'s original sprites; the eyes are the proper color, and I added those wood openings at the tips of the arms. If they look too clunky, I can re-cut them out. Embirch's sprite was easy to make a backsprite for, while Flarelm's was tricky due to the arm pointing out. I'm still not satisfied with it, since the back sprite's one does look small in comparison to the front sprite's.
Edit: I'll be redoing the Flarelm backsprite to make it more accurate and adding the gender difference to that, while leaving the Embirch ones without differences.