Steel Skin is an invincible rogue warrior. He is a Ventian with skin that is literally impenetrable and serves in all other ways to make him indestructible. That is, it absorbs impact, disperses heat, and is inert against noxious and corrosive chemicals. He can survive any missile to the face, or a battle cruiser to the head, or an arrow to the knee. Theoretically he could be susceptible to internal damage, such as food poisoning or nanobots in his blood system, though this too would be mitigated by a slightly increased regenerative system that was standard procedure to help him survive the experiments that gave him his indestructible epidermis.
Steel Skin enlisted in Quantis’ army with the goal of joining the fight against the bullies in the universe. After proving his considerable bravery, loyalty, and creativity, he was soon inducted as a subject for Quantis' super-soldier experiments, with the promise of helping his struggling family back home on Ventis. After returning to battle as an invincible hero and defeating a local evil army, Steel Skin became one of the greatest celebrities in Quantis' army. However, Quantis eventually determined that the culture of Steel Skin's homeworld was unreliable as an ally and ultimately unstable. He ordered their occupation and subjugation in his galactic machine. Steel Skin's loyalty to the greater good he believed Quantis represented held firm, and he helped to bring his home planet under Quantis' control, realizing only later that his family had been part of the resistance that was killed in the conquest. He did not discover this for several years, during which time he gradually lost faith in Quantis' goodness, so the revelation about his family was the last straw that made him sabotage an entire war cruiser and run away into space in sheer grief. Finding no hope of liberating his homeworld, he went rogue and vowed to destroy every cause or ideology that attempted to claim the ultimate loyalty of anyone else, especially Quantis. As such, Steel Skin will occasionally work with the SuperNaturals to pry Quantis' grasp off of a world, but his indignation for idealism causes him to still distrust them for imposing their own ideas of what's right on others. He maintains a lifestyle of a rogue vigilante, tearing down anything he sees as oppression with extreme prejudice. As only one individual, he is not a major player in the galactic stage, though he is quite capable of latching onto a star cruiser and tearing it apart piece by piece despite all defensive weaponry or even the vacuum of space.