Pethis has the compact, forward-leaning posture of someone used to shouldering doors open against smoke and wind. His soot-brown skin is usually dulled by a fine gray film, and his coarse black hair is cropped close except for a stubborn curl that keeps escaping over his forehead. His hands are broad and heat-roughened, with thickened fingertips and nails permanently darkened by lampblack. He smells unmistakably of burnt rosemary, wet ash, and the sharp oil used to maintain his weapons, and he knows it: he offers visitors a sprig of mint before they can mention the odor. He moves with abrupt, economical steps, then goes perfectly still when listening, giving the impression of a bellows suddenly shut.

Pethis is decisive when danger is immediate but hesitant when choices involve trust or blame. In a crisis he becomes blunt, organized, and physically reassuring; at home he is unexpectedly patient with small children and helplessly awkward with adults who are grieving. He is proud of his courage but privately suspects that courage can become a convenient excuse for refusing to think.

Pethis grew up carrying water and hauling charcoal for the communal ovens at Sedge-and-Salt, a riverside district known for its bread and its brackish air. At twenty, he joined the town watch because he believed an organized line of shields could keep panic from becoming tragedy. During the Lantern Quay fire, a warehouse roof began to collapse while the watch captain ordered the gate barred to stop looters. Pethis disobeyed, broke the gate with an axe, and led trapped workers through the opening. He saved nine people, but the fire spread into a row of homes, and his younger brother Tamas died in the confusion. The event made him both brave and distrustful of orders delivered from safety. He later trained with a mercenary company, learning battlefield discipline and the practical use of feints and maneuvers, then returned to keep the district safe. He now shares a cramped house with his widowed sister-in-law Ildiko and her son, who thinks Pethis's old watch whistle is a toy. His former captain, Oskar, still insists Pethis caused the fire's spread. Meanwhile, someone has been buying lamp oil in bulk and asking questions about the old quay tunnels.