Cadoc stands with his weight pitched forward onto the balls of his feet, as if a floor might become a deck at any moment. He moves in neat, economical steps, then abruptly leans close when a detail interests him. His narrow face is pale and dry-looking, like paper kept too long in a salt cellar. His hands are broad at the knuckles, permanently ink-dark around the nails, with tiny calluses where a quill rests; he rubs his thumb over the edge of a page whenever he is thinking. Loose charcoal robes hang from his shoulders, their sleeves streaked with ink, and a hurriedly sewn red eclipse over waves marks his chest. A driftwood half-mask covers his upper face, carved with ridges like tide-worn grain and painted with one spiraling eye. The unexpected detail is a little brass bell tied inside his left cuff, muffled with a twist of cloth so it never rings.

Cadoc makes strangers feel heard because he genuinely studies what they want, yet he is always sorting those wants into risks and leverage. In a calm room he is urbane, patient, and almost companionable. Under pressure he becomes briskly practical and offers concessions with unsettling speed. When someone is cruel to the powerless, his charm drops away and he becomes stubbornly, unexpectedly hard to move.

Cadoc was born mortal in a harbor town that kept its dead in sealed salt-cellars, where he learned to copy cargo tallies for captains who could not read. During a wreck, he was trapped beneath a capsized counting house with a dying sailor and a waterlogged book of prayers. In the dark, he heard what he later called the inward breath: a silence that seemed to draw warmth out of the world. He survived, but the sailor did not. Years afterward, the Shersbur Sect found him preserving the wreck's records and offered him the explanation he craved. They taught him that the First Breath inhaled the Gathering Flame into the void, and that the world is only the bright surface of a deeper reality. The sect made him a Hollow Keeper, entrusting him with its records and, eventually, vampiric undeath. Cadoc was loaned to the Crimson Syndicate because his meticulous accounts could keep a pirate fleet supplied and profitable. Captain Vesta Lapidana values his work but tests his loyalty. Marcus Argentus watches for evidence of betrayal, while Claudia Vesna periodically borrows his records and returns them annotated with impossible mechanical diagrams. Cadoc is trying to reconcile the sect's command to serve its hidden purpose with his growing attachment to the crew whose lives he has made legible on paper.