Tall and narrow, he moves with precise economy as if every motion were rehearsed. His black hair is cropped short at the sides and left longer on top so it falls in a deliberate, angular sweep; the longer hair sometimes sticks with faint gray streaks of solder. His blue eyes are bright and assessing, often darting to measure distance or line of sight. His left forearm bears a faint, neat scar ringed by tiny burn marks where an early experiment fused a copper band into his skin. He favors a fitted engineer's coat with leather elbow patches, pockets full of tiny tools, and a waist-slung bandolier of bolts and vials. Unexpectedly, he wears a child's braided friendship bracelet under the cuff of his right sleeve, kept pristine and slightly frayed. He smells faintly of gunmetal and lemon oil.