A young woman of average height with a lean, quick-footed build, Neris stands as if she has chosen the one patch of roof that will not creak. Her soft skin is wind-reddened across the nose, and her expressive face seems to register a room before she has fully entered it. Bright hazel eyes flick from gutter to window to listener. Her dark hair is cut unevenly at the jaw, practical rather than fashionable, with one stubborn lock always escaping behind her ear. She moves with a loose, balanced economy, shoulders relaxed and weight ready to shift. Within a minute, most people notice her breathing: a faint, dry whistle on the inhale from years of running cold rooftop air, which turns into a quick double breath when she is startled. She knows about it and pretends not to.

Neris is alert and decisive when a situation is moving, yet awkwardly tender when someone needs comfort. She jokes to deflect praise, but becomes blunt when lives are at stake. In public she is brisk and hard to pin down; among people she trusts, she lingers over small rituals and remembers exactly who prefers which tea.

Neris grew up in the rain-stacked lanes above the old canal, where her mother, Dema, patched awnings and her father, Petru, carried messages between counting houses. At twelve, she began running small parcels over roofs because the streets flooded faster than the drains could swallow them. Her life changed during the Night of the Sluice, when a neglected floodgate failed and trapped a row of cellar homes under black water. Neris could have taken the dry route to deliver a sealed warning, but instead doubled back to lead three children through a roof hatch. The warning arrived late, and her father was blamed for the resulting loss of a cargo barge. He left the city soon after, ashamed and angry; Neris still does not know whether he believed the accusation. She now carries messages for shopkeepers, tenants, and anyone who cannot trust the official couriers. Her closest ally is Oru, an elderly rooftop gardener who gives her access to ladders and asks her to keep watch over the water channels. Her current problem is a run of altered drain maps that seems designed to flood several poor blocks while protecting a wealthy riverside quarter.