When dealing with an image that has both a solid focus and a transparent one, only hinting at part of the body being transparent isn't really wise. While the artist will understand why it looks the way it does, the viewer will be lost in the details and assume that perhaps it's just a glitch in the image, or some random power, rather than you conveying that it's a ghost.

Since it has already been pointed out in a previous critique about the shading values of the ghost woman, something else you may want to look into is background. This composition is well done, but with nothing in the background to help move the viewer around the page, it's difficult to keep interest. Also, with the wing tips and the ghost woman's elbow both pointing off the page, something in the background, even just a dark to light gradation of colors can help the viewer not look off the page simply because that's where the limbs were pointing.

One final thing about colors though involving the characters themselves, be wary of how extreme the detail in your winged character shows, versus the extreme lack there of of detail in the ghost woman. Even if the character really is less extravagant in character design, having two extremes that close together can get tricky to keep from making people ignore the less elaborate character.

Over all though, very nice and complimentary color choices, and for not having done the lineart yourself, you've handled this piece well.

So if I am mistaken you just did the coloring, but not the lineart, right? I will just comment on the coloring then, as everything else is irrelevant to you.

I really like the bright colours you used especially the yellow part, the pattern is really well done, beautifully symmetric. To me it feels like you'd have spent more time on the character on the left then the one on the right, because the latter has really only minimal shading, and I think this could really be enhanced!
Also adding "real" eyes would probably help to make it a little more realistic.
The arm is somewhat see through, but this should really be, right?

I think by paying a little more attention to details and doing some more shading you could really improve this!