Ilyena has an alert, slightly forward-leaning way of standing, as if listening for a floorboard to complain. Her tawny skin is weathered at the bridge of the nose, and her dark hair is cut to her jaw, then carefully combed into a precise part that she keeps redoing when anxious. Her small, square teeth show when she smiles; one canine is capped with a tiny brass sleeve, a practical repair that catches the light unexpectedly. She moves with quick, economical steps and turns her whole head toward a sound rather than merely glancing. People remember the brass tooth and the unnerving impression that she has already counted every door in the room.

Ilyena is observant and loyal, but not blindly obedient: she trusts Mara's intentions while worrying that withheld truths can endanger people. In calm company she is dryly funny and surprisingly patient with beginners. Under pressure she becomes brisk and exacting; after a personal slight she goes quiet and overworks rather than picking a fight. She wants to be treated as capable, yet still looks to Mara for reassurance when the stakes turn serious.

Ilyena grew up among the damp lanes and old quarry steps of Harrowdeep, where her mother repaired nets and her father vanished upriver during a spring flood. As a child, she learned to notice who came home muddy, which lamps burned late, and how a neighbor's ordinary cough changed when he was lying. Mara of Harrowdeep took her on as an apprentice after Ilyena quietly found a misplaced packet of medicines by recognizing the fresh drag of its cord through dust. Ilyena now helps Mara with errands, notes, and the small practical work of keeping people safe. The two are loyal to one another, though Mara teaches by hints and unfinished explanations, which frustrates Ilyena. During a winter search for a missing child, Ilyena followed a trail into a collapsed lime tunnel and heard someone trapped beneath stone. She could not lift the rubble; she stayed, marked the turns, and guided rescuers in by tapping a spoon against the wall. The child survived, and Ilyena learned that noticing danger is useful only if she acts on what she sees. Now she is trying to earn enough trust to be told why Mara sometimes checks the same abandoned bakehouse wall twice, while also helping her widowed mother keep their rooms and workshop from being taken for unpaid rent.