Revna is short and broad, with a steady, slightly rolling gait that looks practiced on pitching decks and slick rock. Her hands draw the eye first: blunt, thickened fingertips and pale stone dust settled deep in the creases, the legacy of decades cutting and handling markers. She wears her coat too large through the shoulders, patched with sailcloth at the elbows, but keeps its cracked blue-glass lantern polished until it catches every stray glimmer. She studies a person's hands or boots rather than meeting their eyes. In salt air she smells faintly of wet slate and lamp oil; her mallet gives a dull wooden knock against her hip as she walks.

Revna is patient with materials and impatient with certainty. She can spend an hour testing a marker's footing, yet bristles when someone treats caution as cowardice. In company she is guarded and halting; with a trusted crew she becomes wry, practical, and quietly protective. She wants to be believed, but fears the consequences of being believed too quickly.

Revna Haldane learned stonework from her mother and coastal routes from the crews who hauled cut markers into place. For years she trusted the route records, until one winter a familiar lane buckled under a rescue sled. Revna helped pull two survivors from the water, then spent the night listening to ice groan beneath the remaining markers. That experience changed her from a careful craftswoman into a watcher of patterns others dismissed. Over three separate seasons, she moved three markers under cover of darkness, diverting travelers from lanes she believed were failing. Each time, the safer passage held, but she has no proof that her changes were the only reason. She maintains a private red-marked map and quietly checks in on the people who use those routes. Her former workmate, Toma, suspects her tampering and has been asking increasingly pointed questions. Revna wants the Keepers to investigate the failing lanes, but fears that admitting what she did will make the warning itself easier to dismiss.