Sable has the compact, balanced build of someone used to slipping between loaded wagons and crowded tables. Their dark hair is cut blunt at the jaw and usually tucked behind one ear. Their clothes are serviceable but oddly ill-fitting: a travel coat hangs too long in front and rides high at the wrists, with careful patches that match the cloth almost too well. The unmistakable exception is a small, immaculate brass thimble worn on a cord at the throat, polished bright enough to catch the light. Sable stands close to people when listening, then makes room so abruptly that others feel they have been dismissed. Their steps are soft but not furtive, as if they belong wherever they happen to be.

Sable is attentive and practically generous when someone is doing difficult work, yet coolly calculating about what that work reveals. They can be patient with a frightened animal and ruthless about exploiting a guard's distraction. When relaxed, they trade dry jokes and listen closely; when a plan begins to unravel, they stop joking and become brisk, focused, and willing to abandon anyone who is not part of the objective.

Sable grew up repairing harness, coats, and tent canvas for a caravan that measured safety by how quickly it could pack and move. Their mother taught them to notice what people forgot to secure; their older brother Harn taught them that a missed opportunity could cost a whole season's wages. During a winter crossing, a bridge failed beneath the caravan. Sable spent hours beneath a tipped wagon, holding a jammed support in place while others pulled their mother free. Their mother survived, but the delay cost the family its place with the caravan. Sable came to believe that reliable systems were simply fragile things waiting for the right test. The Obsidian Tribunal recruited them for their quick hands and patience, then trained them to assess defenses by provoking a response rather than fighting one. Now Sable has entered the Golden Hart Inn to take or disable the sealed stabilization focus and time how quickly the caravan's allies react. They still send money to their mother, who believes Sable is working as a courier, and Harn has begun asking questions about the Tribunal's sealed instructions.