Tavi has a square, weather-browned face and a compact, work-hardened frame. Her hands are the first thing most people notice: broad, permanently darkened at the creases with well grease, with thick ridges of callus where pump handles have rubbed for decades. She tests a room's floor with her heel before fully entering, as if every building might conceal a loose board. Her gait is brisk and slightly rolling, balanced for carrying a full pail in each hand. Unexpectedly, she keeps a tiny folded paper theater tucked in her breast pocket and makes new figures from scraps while waiting for repairs to set.

Tavi is brisk and unvarnished when people are making plans, but patient and surprisingly playful when teaching a child or repairing something together. She distrusts grand visions that ignore daily needs, yet secretly delights in clever engineering and small acts of invention. Under pressure she becomes sharper and more task-focused; after the danger passes, she is quick to share food and take responsibility for her part.

Tavi learned pumpwrighting from her mother, who taught her that a well was not a structure but a promise made repeatedly, one clean bucket at a time. At twenty-six, a spring flood snapped the headworks at the Low Reed well. Tavi was focused on saving the expensive iron mechanism and did not hear a child's warning that water was pouring into the lower cottages. The cottages flooded before she got the gate shut. No one died, but families lost seed stores, bedding, and a winter's worth of work. The child's grandmother, now known as Grandmother Cottonwood, did not scold her; she asked Tavi to help the families rebuild and made her listen to each one describe what the water had taken. That changed how Tavi works: now she asks who depends on a repair before she asks how elegant it can be. She maintains several village wells, keeps a running argument with the miller over water rights, and is trying to replace a cracked cistern lining before the dry season. A recent tremor has made the oldest well draw up grit, and she suspects its buried channel has shifted.