As stated before, the anime style tends to have sharp edges rather than smooth flowing ones. Now to give it some 'depth' or layers so that it doesn't look flat. Find a few bumps you want to work with and stick with them. And I tend to see all the faults first. I've noticed that anime clothing folds tend to be quite sharp and 'unnatural'.
Isabella. Age: 21.
Yes, it's meant to be an arm.
Stella. Age: 25.
Drawing Anime Clothing Folds
If the curve of your 'C' goes in deep enough, add a line. Make a sharp fabric flow that leads upwards. I try my hardest to make sure everything I do is satisfactory.