Runa is a short, young woman with softly rounded features and a quick, attentive face. Her bright hazel eyes rarely settle on a speaker for long: they map exits, windows, loose stones, and hands, then return as if nothing happened. She moves with a thin, balanced lightness, placing her feet as carefully as someone crossing a roof slick with rain. Her skin has a softly textured, natural look, and her plain round ears show beneath a practical sweep of hair. She leaves the impression of someone who has already noticed the thing you hoped she would miss.

Runa is brisk and practical when people are in danger, but surprisingly patient with anyone learning a useful skill. She distrusts official assurances yet feels an awkward respect for people who do public service honestly. In a crowd she is alert and watchful; among friends she becomes teasing and generous. When frightened, she talks faster and makes overly specific plans rather than admitting she is afraid.

Runa grew up above a drainwright's shop in the old city, where rainwater ran through brick channels older than the street names. Her mother, Dema, taught her to read building plans; her father, Orso, taught her that a locked door usually meant someone was afraid, not merely rich. At seventeen, Runa helped map a blocked culvert beneath the Sedge Market. A sudden storm flooded the passage. She escaped through a maintenance hatch, but her mentor, Tavi, stayed behind to hold a jammed gate open and drowned before help arrived. Since then, Runa has refused to trust a plan that has no second exit. She now works as a discreet rooftop courier and informal finder of missing people, using old service routes to move through the city. Her closest regular client is Sumi, a rooftop gardener who shares food and gossip; her father wants her to take safer work, and a building inspector named Hessa keeps asking why Runa's maps show sealed routes that official plans omit. Lately, a series of fresh bricks has appeared in the oldest drains, and Runa suspects someone is closing passages while people are still using them.