The skin seems a little red, perhaps if you started out with a light undertones or tested out some color penciled blending on a separate sheet you could find the best tones suited for skin color.
However, what I really love about his picture isn't the technique. It's the expression on Yogi's face. There's plenty of artwork and fanart with Yogi, but the expression illustrated here is one that is rarely captured in such works.
Such an expression is an interesting commentary on the great sadness Yogi has withing him, for he has to repress this other personality within him and battle Varuga. He attempts to hide such suffering with a smile and silly antics (which seems to be shown through the bright cloud background), but at the end of the day he has a sort of melancholy to him which you captured here.
It's great that he also looks at the viewer as if attempting to convey his real emotions onto us.
the eyes are beautiful!
How much do prismacolor pencils cost?
And what's Lyra? A digital art program?