I don't have time to do an edit, but there a couple of points I hope might help.
The neck is
very long and thin. I know we're dealing with a manga/anime style, so the anatomy isn't going to be completely realistic, but I think you could actually reduce the length by half and it'd look a lot more natural.
I'd also be inclined to reduce the amount of head above the eyes a little bit. If this were in a realistic style, I'd say that the eyes should go on the halfway point on the head. Googling different anime styles shows that there's a bit of variation, so you don't need to go for the exact halfway point necessarily, but the top of her head looks unnaturally large to me.
One final thing is the shape of the forearms. I'd bulk them out just below the elbow. I'd say that's particularly important given the position of the far arm (her right, our left) since, without the shape of the muscle (I want to say it's the brachioradialis that particularly gives it the distinctive shape, but I'm not an anatomy expert), it's a little difficult to understand which way round she's holding her arm.
I'm looking forward to seeing the next iteration of this. I really like the outfit, and your shading on the top is looking great so far
