Rough draft: At first glance there is nothing terribly unusual about Tetsu. He looks like a muscular, 6'6 human male, with only a very thin layer of whitish hair upon his head. However, upon closer inspection a few oddities appear. First, his skin is quite pale, but instead of a healthy pink tinge it appears to be a granite colored gray. Second, his weight is clearly much more than it should be. And finally, his irises are a strangely metallic color, almost like liquid mercury.
Tetsu would tell you that he quite simply doesn’t have a temper. This is patently untrue.