These are some of my concept images for the android pair. Faraday is significantly shorter and stockier than Coulomb who has a slender figure and 'softer' almost shaped eyes. While separate units, they are like left and right sides of a brain, and when Coulomb was destroyed, Faraday was rendered a crippled shell trying to fix itself. At the very least, his master has not let him give up, and so he continues on.