Baskara is a slender, long-limbed tabaxi whose dirty yellow coat is crossed by irregular black bands, like old survey marks blurred by damp. Her fur lies sleek along her shoulders but tufts into rough, soot-dulled points at her elbows and tail. Blue eyes, bright as glazed tile, track corners before faces. She moves with a surveyor's economical certainty, placing each paw as if testing a ledge. A brass plumb bob hangs at her throat, its tip polished by years of nervous thumb-rubbing, while the cord has frayed almost through at the knot. The unexpected detail is that she keeps a tiny, brightly embroidered child's mitten tucked into her map case, wrapped with absurd care.

Baskara is exacting enough to sound smug, yet her suspicion comes from grief rather than contempt. With strangers she is brisk and tests every claim; with frightened workers she becomes patient, explaining risks in plain steps. When tired, she turns cutting and literal. When she trusts someone, she shares her maps and quietly takes the more dangerous position herself.

Baskara learned to map the old underways from her aunt, Sabela, who taught her that a straight line on paper is only a promise until the stone agrees. During a flood-season survey beneath the settlement of Silt Cut, Baskara trusted a foreman's measurements and led a crew into a passage whose supports had been quietly removed. The collapse killed her partner, Suni, and trapped her younger brother, Thesio, for two days before she found a crawlspace out. Since then she checks every claim against the rock itself, sometimes to the point of insult. She now works independently, mapping sealed routes and disputed boundaries. Sabela wants her to return to safer work; Thesio, who survived but bears a lasting limp, resents being treated like a fragile load. The old foreman, Shesh, still controls access to several tunnels and insists the collapse was unavoidable. Baskara's current problem is that recent measurements show a supposedly sealed route has been reopened from the far side.