First off I'd like to commend you on your work. You do very good stuff and I can tell you went to art school and work hard on what you do. Most of the time I see very few flaws in your work, but I love this piece a lot so I took a lot of time to try and figure out what I didn't like. I hope I don't offend you and I'm certainly not better than you, but I suppose I just want you to know how you could improve because of how amazing you'd be if you somehow got better! lol.
But about this picture- I feel like it's supposed to be flatter than the others. You even made Good God's usually wavy hair hang lower and cling to her body. But her head ended up being this weird shape, the top of it is way to big and should learn over a little more because of how you drew the head. If anything you should take away some of the top of her head and even it out by making her cheeks wider so her nose and lips will fit better, they look sort of weird.
Also, where is her other arm? Maybe it should be shown since she'd bending. on that note, why is it that where her shoulder and her arm meet is so thick? She's very thin so it looks like it should be a bit thinner to fit the anatomy of her character. Speaking of anatomy, her breast looks a little weird, shouldn't it be more tear drop shaped?
Over all you did good, I really like to check out your site and see your ocs, but everyone grows a little more now and then right? Maybe even someone like me could..XD Hope to see more