Sorry bout the shitty left arm, it's supposed to be rotating.
Alright, now onto his description.
He was created during the rising years of a great civilization, long since passed. The grand skyscraper of a metal man, standing at an imposing twenty-six meters tall. Made of solid iron with smooth finish. He is now 14,195 years old.
Many years into his service defending the people of his civilization a great virus spread through the land and wiped all life from almost the entire planet. For all of his strength and durability, he was unable to stop the plague from spreading. After a thousand years only two cities remain. The Great Desert Kingdom in the far west, and the Roaming Citadel that travels over the oceans. Though he remains alone in the decrepit remains of his capital city, protecting the ruins of lives long since passed.
From time to time he does leave the city to travel the world. Once even dragged into the depths of hell by a necromancer, where he met the one who loves him. And the one who gave him his scar, Maria*1.
As a person, he is very militaristic and straightforward. He has never once lied, this is an absolute fact. As he is unable to do so. In combat, he is unrelenting and direct. He is incredibly wise from millennia of literally nothing but thinking of how the universe works.
1: Maria will be drawn at a later date.