Luma Oru waits half-crouched in the cattails, weight pitched forward as if the mud itself might try to steal her footing. Her broad straw hat is patched with strips of sailcloth and dips low over eyes the color of wet amber. The shell beneath her oilskin coat is ridged and pitted like old river stone, its edges wrapped in faded red cord. She keeps a clay pipe clenched at one corner of her beak, its smoke smelling of bitter sage and damp peat. A scattergun rests against her shoulder, aimed toward the settlement beyond the reeds. Though she makes her living stopping smugglers, she has painstakingly stitched a tiny row of embroidered moths inside her hat brim, visible only when the wind lifts it.

She is brisk and suspicious when strangers arrive armed, yet unexpectedly patient with children, injured animals, and anyone learning the marsh. In danger she becomes decisive and blunt; after danger passes she tends to replay every choice aloud as if cross-examining herself. She jokes dryly when uneasy, but dislikes being thanked for work she considers ordinary.

Luma grew up ferrying medicine and mail between the stilt houses of Oru Ford, a settlement built where an old causeway pinches the marsh. She learned to read water by its smell and to distrust a quiet channel. At twenty, a flood tore loose the ferry platform during a night crossing. She saved two passengers but lost her younger brother, Nao, when she chose to cut the towline before the whole platform dragged them under. That choice made her a warden and left her unable to forgive herself. She now patrols the marsh roads, keeping the settlement's wells and causeways open while a land company pressures its council to sell the surrounding peat flats. Her former partner, Edda, keeps the ferry and wants Luma to stop treating every compromise as a betrayal. Meanwhile, a string of night blasts has driven the marsh birds inland, and Luma suspects someone is testing weapons near the old channels.