Arwen is looking pretty great. The design of the clockwork leg is pretty inventive, the belt is real neat, and the simple color scheme works well. The parts that need to stand out, stand out. Her face is also nice, simple but expressive.
I’m not a huge fan of arbitrary asymmetry in designs, but it works in this case because she’s an adventurer.
Some very small things I noticed:
Maybe slightly change the color of the gun, so it stands out from her coat more? Right now it sort of blends in.
Are those armored hems supposed to be part of her coat or a separate piece?
Where are the straps of her goggles?