Omg this is so gorgeous, you've done an excellent job on the shading and giving the feathers sheen!! I also like the pose you went with and the golden ring is a really good addition that kind of ties it all together c:
You wouldn't believe it, but in the initial version (which I deleted within a minute because I was so dissatisfied with it :'D) the sheen was hardly there. I'm really really glad I realised that soon enough to rework it, and now I'm quite happy with it. ^^
I've often seen people do golden rings in the past and always thought they looked really cool, but for the longest time I had no idea how to make them look good, and even when I did, it took a while until I found a character that it would suit with. Coin here was just perfect for it, her golden accents were practically begging for something golden in the background.
Yes! The sheen adds so much to this piece as a whole so I too am glad you caught that!
I know exactly what you mean, I absolutely love circular ring-type haloes and there are some characters that, like you said, are just begging to have one added for them