This is very dreamy and it has a gentle beauty in the girl but the wings are kind of scary -- in a good way. It invokes contrasting emotions and its very powerful. I really like it. I could stare at it for a long time. The muted lighting is beautiful.
The dress looks so lovely, although the wings...look kinda gross. And broken. They remind me of dirty sheep wool from farms I used to visit. But maybe that's the thing you're going for, as the angel's leaning against a very worn down/dirty beam. If so, then you got it perfect...so I'd see it as:
A broken/dirty angel, perhaps trying to redeem herself in the eyes of her deity or the worshipers themselves.^^