One thing that always gets me though, since I always look, is how the tail is done. There should be a continuation of the spine going down the tail, so there would need to be a curve even to point it out at a 90 deg angle out from the body. This drawing however goes even further with a sharp angle smaller than that, quite close to 50-60 deg or so.... Essentially, her spine (at the point where her tail is attached) would be broken.
Again, the art itself is great if you don't pay attention to that. Love the pseudo ink paint style that fits well with Dusk's theme and the pose is well done along with the spacing.
I just happen to always check out the tail on characters when they have one. One example was there was an amazingly animated video for Chongyue (another of the dragon siblings). The animations were fluid and well choreographed, but... I could not stop paying attention to the fact that his tail stuck out of his body at a perfect sharp 90 deg angle. Made me think it was like a child's costume when they attack fake tails to someone's belt and it just sticks out. The rest of the tail animation and movement was great, even used in the fight... It was just that one point that bothered me in an otherwise great fan video.
