First, I have to say the picture is beautifully drawn. Fantastic amount of detail (even if it does seem rather racy for a wedding dress). Various minor things that could only barely be considered 'flaws':
The veil on the right side of her face, the edge of it dips down to match the top end of her dress. The line (at image coordinate 419,511) doesn't extend upwards past her face, but only shows up against the skin above her breast. Because the bottom of the veil matches the line of the dress, it appears to be part of the dress's structure, but at the same time is confusing because it doesn't make sense for there to be anything there.
Further, it extends into a line drawn across her breasts, which looks like something that really shouldn't be there. If that line across her breasts wasn't there, I think the line marking the veil would look more natural.
The splayed cuff on her left wrist has a slight problem with perspective. The one on her right wrist indicates that the 'petals' on the cuff should be angled more closely parallel to her arm, but the ones on the left wrist look like they're spread out closer to perpendicular.
Miria's eyes: Ok, I've had to go back and check my manga, across several different arcs, just to be sure. The eyes are slightly off. Her eyebrows should be slightly sharper, and where your pic has her eyes angling out in teardrops towards the outer edges, they should really have greater width towards the outer portion, rather than lesser. This is more for her left eye (right side of pic) than her right eye, which isn't too far off.