Sanna is a lean, weather-browned human woman of average height, with straight black hair usually braided close to her head and pale gray-brown eyes that rarely stop studying the horizon. Her hands are callused from travel, shield work, and setting traps. She wears battered chain mail beneath a faded gray-green cloak, and a narrow strip of blue cloth is tied around her left wrist as a reminder of the mountain pass where her life changed.

Quiet, observant, and practical, Sanna speaks plainly and dislikes wasteful displays of emotion. She is gentler with frightened animals than with arrogant adults, and she has a dry sense of humor that appears unexpectedly during dangerous situations. She prefers useful promises to beautiful speeches, but once she gives her word, she treats it as a physical burden she must carry until fulfilled.

Sanna Salonen was born in a small human settlement at the edge of a high, wind-cut valley. Her family guided traders, hunters, and pilgrims through the wilderness, teaching her to read snow, stone, and silence before she could read a book. She spent more time beneath open sky than beneath a roof, and learned that survival depended less on strength than on patience, preparation, and knowing when not to move. Her closest companion was an old trail warden who taught her the use of a shield and sword, insisting that a protector must stand between danger and the vulnerable even when victory is impossible. During one winter crossing, an avalanche buried a caravan under the pass. Sanna survived by sheltering beneath a broken wagon, but several travelers died within arm's reach before she could free them. In the cold aftermath, she swore an oath to protect the living without pretending that the world was fair or ordered. The oath did not make her devoted to any god, nor did it give her a grand vision of justice. It gave her a duty. Now she travels as a paladin and wilderness guide, carrying supplies, tending wounds, and confronting threats that prey upon isolated people. She distrusts certainty, respects honest fear, and believes that a person is measured by what they do when no one is watching.