As its name suggests, Giganto is an enormous black-and-gray robot that dwarfs most in height. It has a roughly humanoid stature somewhat reminiscent of a Soldier, with a broad torso and large shoulders compared to its thin limbs and lower body. Its arms end in three-fingered hands, while its legs terminate in rounded stumps. Its head consists mainly of a massive mouth with multiple nested jaws of squared teeth; a pair of protrusions extend from its chin, and it has a somewhat long neck.