Tesk is an elegant humanoid framework of warm ivory bone, narrow through the waist and shoulders, with long jointed limbs that move in careful, almost liquid increments. Their skull has a blunt, practical shape, with small horn ridges running from brow to crown like a comb worn down by weather. Their jaw opens farther than expected when they laugh or eat, revealing three neat rows of fine, black enamel teeth. They smell strongly of beeswax, brine, and crushed fennel, a scent they cannot perceive and therefore constantly underestimate. A strip of red wool is threaded through the ribs over their heart cavity, giving the contradictory impression of a fragile, half-dressed pilgrim who might also be an old ceremonial weapon. Their movements are quiet except for a faint clicking from the left knee, which sounds almost like someone counting coins.

Tesk is patient with strangers, exacting with friends, and almost unbearably gentle with the dead. They enjoy useful work because it gives their thoughts a shape, yet resent being praised only for usefulness. They can be generous with food, directions, and labor while being secretive about their own history. In danger they become focused and coldly efficient. In safe company they reveal a dry humor and a surprisingly mischievous fondness for practical jokes involving mislabeled crates.

Tesk was awakened in the salt marsh settlement of Orsava by a bonewright who needed an assistant capable of entering collapsed crypts without breathing. Their first memories are practical ones: carrying lamps, sorting grave fragments, and learning which bones belonged to whom. During the Floodwake, a tidal surge broke through the town cemetery and carried hundreds of ancestral remains into the harbor. Tesk spent three days in the freezing water, assembling the dead into temporary funeral frames so families could identify them. The work changed them. Before the flood, Tesk believed identity was something preserved inside the skull. Afterward, they came to believe it was something maintained by the living through names, stories, and repeated acts of care. They now serve as a traveling mortuary clerk, mediator, and discreet finder of lost remains. Their current problem is that Orsava's new magistrate has begun selling unidentified bones to collectors, while Tesk's former mentor, Boro Senn, insists the trade is necessary to save the town from debt. Tesk is caught between loyalty to the person who gave them purpose and responsibility toward the dead who cannot defend themselves.