Darrow looks built for a narrow trail: compact, square through the shoulders, and balanced on the balls of his feet as if the ground might shift. His sun-browned face has a broad jaw and tightly packed teeth; when he eats, he bites through dried meat with the steady force of a trap closing. His laugh shows a small, blunt gap between his upper incisors, then stops abruptly. He smells strongly of crushed juniper and mule sweat, a scent he mistakes for the canyon itself. His movements are economical, but his gaze keeps measuring slopes and exits.

Darrow is a careful provider who can turn cold the instant a plan requires sacrifice. He is patient with frightened people and brusque with confident ones, yet he privately envies those who can trust a cause. In a calm camp he listens more than he speaks; under pressure he becomes brisk, exact, and difficult to interrupt.

Darrow once hauled water and survey gear for Meridian Crown Expeditions LTD, learning how official maps turn inhabited places into blank space. During a disastrous crossing, his younger brother Harl was left behind after a guide misread a dry channel. Darrow returned alone with the expedition's instruments and a certainty that companies reward useful survivors, not loyal ones. He later gathered deserters, muleteers, and displaced canyon folk into a band that robs supply trains but avoids settlements. Now Meridian Crown has offered payment and a place on its next expedition if he delivers Fenn and Fenn's notes to a representative. Darrow has accepted, though the notes may expose the company’s role in the crossing that killed Harl. His second-in-command, Tessa, suspects he is bargaining for more than money; his former mentor at the company, Orik, expects him to honor the contract.