When this forst displayed on my monitor, my first thought was "Donald Duck". All I saw was the top of the head, the eyes, and the top part of the filter mask. Some ink washes on the mask and hoses will add some contrast and depth. Blacklining around the armor, will provide better separation between the flesh and the armor, and more contrast with the flesh will raise to the next level. Compare the color transition on the armor to the flatness of the flesh.
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