Tavi is a wiry young woman with the compact balance of someone used to stepping over roots and slick stones. Her dark hair is braided close to her scalp on one side and left in a wind-tangled fall on the other, threaded with dry reed fibers. She carries a thumb-length whistle of green river reed, rubbed pale and smooth exactly where her lower lip rests against it. Her broad front teeth show when she laughs, and she worries one corner of her jaw while listening, as though testing a thought between her molars. She moves with quick, soundless footfalls, then stops so abruptly that leaves keep drifting after her. She smells faintly of rain-soaked bark and crushed mint. The unexpected detail: she keeps a tiny clay bird with a cracked beak tucked in her boot, a child's toy she treats as more precious than her weapons.

Tavi is observant and generous with practical help, yet prickly when people assume she is only useful as Niach's sidekick. In calm moments she jokes and shares food; when the grove is threatened, her humor vanishes and she becomes blunt. She craves reassurance but distrusts praise that arrives before she has earned it.

Tavi's family found shelter in the grove after a flood washed their hillside home into the river. The grove's springs and dense briars kept them alive through a hard winter, and Tavi grew up learning its paths from her mother and its bird calls from her older cousin. Years later, when timber cutters pushed toward the spring, Tavi froze at the decisive moment and waited for Niach to make the call that drove them away. No one was hurt, but the delay let the cutters mark several old trees for felling. That failure changed her: she began mapping the grove herself and practicing signals until she could guide people through it in darkness. She is now an ally and local guide, but the grove's boundary stones have been moved, and someone has been poisoning one of its feeder streams. Niach remains her trusted companion, though Tavi is determined to prove she can choose and act without leaning on them.