There is really nothing really wrong with the Cosplay that I can see after looking it over.
The wig is styled nicely, great color and flow to the hair, very natural looking, the ears sit well with it, besides from a bit of fluffy bits on the top, its perfect, but its hair and hair is rarely perfect in this world.
The props look amazing, from what I can see, they look solid and well done, the bow and sword look accurate, the only issue is the sword looks a bit off straight along its length but that could be due to the camera and angle of the shot.
the outfit as a whole is very well done, great job on the boots and cape. All the flairs of it are really eye catching and you can spend a lot of time just looking at the small details of it, its all very straight and has a smooth flow to it, with nothing sticking up or looking odd.
Id really have to say the only thing I could see as an improvement is toning down the exposure as it blends the sword in to the background just a bit too much.
lovely hmmm, since you are requesting a critique (although this is more of an informal impression), I would say that you have such lovely details here in your outfit, but they almost get "blended" because of how they are overlapping in the pose. ie the dress, bow, sword and arm armor all seem to blend and it takes effort to separate them. Holding the bow away from your body might help show off all the lovely details a little better.