Toma is a compact human with a square, weathered face, broad nose, and close-cropped black hair threaded with a few premature gray strands. His most noticeable feature is his jaw, which is unusually strong and slightly asymmetrical from years of chewing dried roots, leather cord, and hard trail food. When he laughs, his upper teeth show in a neat, flat line, but he rarely laughs without first checking who else in the room is watching. His gaze moves constantly, measuring exits, hands, windows, and the distance between people rather than settling on faces. He wears battered leather armor beneath a faded soldier's coat, with a copper sun-disc tied at his throat and a black iron ring hidden on a cord beneath his shirt.

Quiet, practical, and difficult to impress, Toma speaks in short observations rather than opinions. He has a soldier's instinct for routine and a veteran's distrust of grand speeches. Beneath his guarded manner is a stubborn kindness, especially toward frightened recruits, hungry travelers, and animals that have been mistreated.

Toma served as a road soldier in the high valleys, escorting grain wagons, tax clerks, and pilgrims through passes where winter could kill more surely than bandits. He was never the strongest fighter in his unit, but he was patient, observant, and dependable. He learned to watch the hands of strangers, the movement of birds, and the way pack animals refused certain paths. His unit called him Stonejaw because he could chew stale travel bread without complaint and because his silence made arguments die around him. During a night march, his patrol found an old shrine buried beneath a landslide. Inside lay a black iron ring engraved with a spiral of tiny teeth. Toma put it on only to keep it from being lost, and immediately heard a voice speaking from the dark between his thoughts. The voice offered him the power to protect his surviving comrades from an ambush that had already begun. Toma accepted, and shadows answered his command. The soldiers lived, but the shrine's voice has followed him ever since. It calls itself Vark, an imprisoned intelligence beneath the mountains, and it insists that every favor creates a debt. Toma now travels as a warlock and veteran, seeking the shrine's true entrance before Vark finds a way to make him pay in full.