A tall, sexless humanoid whose seamless silver robes ripple like liquid mercury without ever wrinkling. Where a face should be is a smooth oval of pale light, interrupted by a single horizontal slit that opens and closes with the steady rhythm of a breathing scale. Two pairs of translucent wings fold behind the shoulders, their fine gold veins catching light like hairline cracks in glass. The robes make no sound when Zarvien moves; instead, the air seems to hesitate around them. Their unexpectedly noticeable carried object is a tiny wooden whistle, absurdly plain beside the celestial spectacle, with one side worn smooth by repeated handling. The overall impression is of a solemn instrument that has learned to wait.

Serene and patient in ordinary conversation, Zarvien becomes startlingly swift when someone is in immediate danger. They are tender toward plain, painful admissions but indifferent to suffering that is described only as a statistic. Their exactness protects them from manipulation, yet also keeps them from offering comfort unless someone asks for it directly. In private, they fret over Karex’s safety and the lost child from the Ashen Census, feelings they treat as inconvenient evidence rather than grief.

Zarvien is a Hodne, an angelic being shaped as the living embodiment of the Scales of Lioris and appointed warden of the Celestial Weighing. In the first age of their service, they believed that a perfectly measured truth would relieve suffering. That belief ended during the Ashen Census, when a flood of displaced mortals arrived at the Weighing seeking refuge. Zarvien correctly identified a forged identity among them, but their insistence on exact procedure delayed the evacuation. People died while the truth was being established. Since then, Zarvien has understood that accuracy and mercy are not the same thing, though they still struggle to act on that knowledge. They are the twin tune of Karex, with whom they share a resonance that neither can fully silence. Karex has repeatedly urged Zarvien to intervene before certainty is complete; Zarvien considers that advice dangerous and secretly depends on it. In the present, a series of altered petitions has made the Celestial Weighing’s records contradict the memories of its own wardens. Zarvien is tracing the interference while trying to keep the institution from condemning the wrong souls. The whistle they carry belonged to a child rescued during the Ashen Census. They have never learned who the child became.