Concept design (updated)

Science fiction oriented video game character concept design. Preparing portfolio for gaming companies. A drawing done on my A4 sketchbook, scanned. Masked it and planned lighting in grayscale mode.

Edit: added colored version. Looking at it critically, it could be more symmetrical, and the hand position or the pose is not as convincing as it could be but the picture is still a bit progression on my path from mediocre to great.