Making critiques is something I can't resist, maybe because it makes me feel professional. But whatever, lame jokes apart, this picture is beautiful! You have truly shown off the most beautiful of colour schemes and wonder in crafting this picture which is truly in words a labour of love.
I love the detail, colours and the whole thing in general is just beautiful! It's pretty hard to believe it is not made digitally, it's just so wonderful! The whole picture practiaclly speaks volumes of serenity and modesty as shown in your picture. I love the eyes, they seem to mesmerise you, stare straight into your soul with that dapple of ocean blue and the glow of sky.
(I am a writer, I'm bound to be dramatic, but seriously, this is beautiful!)
Artists often draw from their heart and pour themselves into it. You clearly have proved that distinction and I wish you all luck for your future drawings.
This must be featured in some anime or mang, somebody should hire you fro this- just sweet!