Lost Wings Sketch - WIP?

I was originally going to draw fan-art for Quintessence: The Blighted Venom (an indie RPG focused on storytelling - see quintessence-tbv.com), but ended up doing this. She was supposed to be Lunair, the main character of that game. But now she is an angel. Probably a fallen angel. This angel's story is very unoriginal, and I don't feel like talking about it at this moment.

I was told to color this, but I really suck at coloring with brushes and similar tools (in either traditional or digital media). And I don't think I want to go and trace this in vectors right now. Probably later.
But I am definitely going to try coloring it.

Consider this a work in progress.