Kavi is a broad-faced Ursoid with dense, seal-brown fur that clumps into dark, damp points around her cuffs and jaw after a day among the vents. She carries her weight forward over the balls of her feet, as if the ground might change its mind, and walks with a measured, side-to-side balance that makes narrow ice ridges look wider than they are. A brass pressure dial at the tip of her pole ticks softly when the vents draw breath. Unexpectedly for a hard-driving routekeeper, she keeps a pocket of paper cut into tiny birds, folded during long watches and left at rescue stations.

Kavi is decisive when a crew is in danger but surprisingly patient when teaching a novice to read a vent. She trusts measurements more than instinct, yet she will abandon a perfect schedule to help a stranger in trouble. In a calm mood she explains every call; under pressure she becomes clipped and expects immediate obedience. Her firmness protects people, though she sometimes uses it to avoid discussing the guilt she carries.

Kavi learned the vent routes as a runner carrying pressure readings between Sedge Guild crews. Her older sister, Nima, was a skilled pilot who trusted Kavi's first route chart too much. During Kavi's first winter as a lead guide, an unmarked thermal surge broke a shelf beneath their crossing. Kavi cut the guide-line to keep the rest of the crew from being dragged into the fissure. Nima survived, but lost her lower leg and now maintains route instruments at Hearthfall. Kavi still visits with parts and paper birds, though their conversations often turn into arguments about whether caution can become another kind of abandonment. She now leads crews across the steam corridors, protects the people who keep those paths open, and is quietly investigating why several pressure markers have begun to disagree with the vents themselves.