D & C - Stand out to me D cause of the weapons / Armor and C cause i like the idea that he has water in his tank and he can also fight outside of water.

It's looking pretty good so far but the legs look really broken and out of perspective in that last piece, the left (his right) especially needs to be larger

Gangsta puffer fish ! I love the idea :smiley:

You could use some atmospheric like perspective on your thumbnail, even if it's on the same character, because of the very heavy perspective. This could really help to read what's going on.