Great color palette and details. Gives it a very space / underwater feel. Unusual costume / weapon design, too. Could possibly use some highlights / contrast to stand out a little more, but overall I love the murky, mysterious tone. Great work!
I just realized that I had a screen darkening plugin (Nightmode) running when I looked at this. (Looks sheepish) Looking at it as it's meant to be seen now, I take it back. Yeah, I wouldn't add any more hilights to this at all now.