Guntras is controlled by an advanced AI, superior to the other Chouseishin to have a will of his own. Initially hidden away in the Andes, referred as the "Great Shadow" in Peruvian legend, Guntras resurfaced when his Guntroller is repaired & Logia controls him, planning to use Guntras' oxygen fuel supply to have collide with the Sun & trigger a nova strong enough to evaporate Earth after killing the Gransazers first. Tenma eventually got the Guntroller & freed Guntras, who joined up with Cloud Dragon as an ally to the Sazers. Guntras is armed with an array of deadly weapons, among them a laser battery on his chest, a cannon on his forehead, & missile launchers on his body. He can fire & immediately replace his fists in his Twin Crusher attack, & his powerful feet can create devastating sho