The entity known as G-159 exhibits a visage that is reminiscent of a green hue, with a shade akin to that of emerald applied to its teeth. Its primary facial expression is one of madness, with realistic circular eyes that bear a green hue instead of the expected red, giving the impression of bloodshot eyes. The second iteration of G-159 is similar in appearance, but features two rows of tightly clenched teeth, a realistic esophagus-like structure for its mouth, and a flesh-like texture.