Assassin Luner

I shall start by saying that I love the color choices as well as the shades.
The pose, however, seems a bit stiff/unnatural. My suggestion would be to imagine someone in our reality doing a pose you've selected. If it seems impossible, weird or unnecessary, it would probably seem that way when translated into art.
Secondly, proportions are a bit off on the legs. Another suggestion would be to compare the length of the proposed arms to the legs. They are supposed to be about the same length. So, if one pair is significantly longer than the other, you may need to lengthen the shorter or to cut some length off the longer.
Thirdly, the longer I looked at the lines you used to outline a feature or the figure, the more I notice that they don't seem to 'flow'. Try to do those outlines in quick strokes rather than slowly drawing them out.
The arms are a bit too thick for the proposed figure. If that was the intention with the cloak, another suggestion would be to have it look like gravity is affecting it.
The hand on the right seems to be a bit unnatural. Try looking at your hand for guidance on how a clenched fist would look. Also, a more relaxed pose for that hand would fit this artwork more.
The seems that an updraft is lifting the cloak, but the hair is flowing in another direction. Continuity is key.
You may want to create a more... unique style for the character. I know you're trying to create an 'Assassin's Creed' feel, but the games of the before mentioned franchise showcase a diversity of outfits for the main characters.
All in all, tis' a good piece of art. I congratulate you for having way better coloring skills than I do XD
However, it can be improved. I hope my critique can aid you in your journey.