Nemi is a petite, wiry young woman who stands beside rain-dark railings as if ready to spring onto the next stair. Her light olive cheeks flush pink in the cold, and damp dark-brown curls cling in small commas to her forehead. Hazel eyes flecked with amber take in doorways before faces. Her quick half-smile seems to arrive a breath before she decides whether it is safe to keep. She moves on the balls of her feet with a runner's compact balance, then goes still so completely that passersby sometimes mistake her for part of the railing. The unexpected detail is her immaculate, almost ceremonial attention to the tiny brass swallow at her cuff, which she polishes with the hem of her cloak even in the rain.

Nemi is briskly capable with strangers but privately tender toward anyone left out of a plan. She jokes when frightened and becomes startlingly direct when someone is in immediate danger. She longs to trust her neighbors, yet checks every exit before sitting down. Praise embarrasses her, though she remembers every kindness.

Nemi grew up in the close-packed roofs and stair lanes of Vey's old quarter, where her mother, Iva, kept a rooftop garden alive with water caught from the gutters. At twelve, Nemi learned the city's drain paths as a message-runner, carrying notes between kitchens, roof doors, and street stalls. During the flood called the Lantern Night, she heard water hammering behind a blocked channel and warned the neighbors, but froze when her little brother Toma was swept from a stair landing. A lamplighter named Branik hauled him out. Nemi has never forgotten that she saved a dozen strangers and still believes she failed the person who mattered most. Now she works as a route-runner and informal guide, quietly mapping drains that a property developer has begun sealing. Iva wants her to stop risking herself; Branik thinks she should tell the watch what she knows; and Toma, now apprenticed to a mason, insists he was never angry with her. Nemi has not yet found the courage to believe him.