A lean human man with a narrow, weathered face, dark brown hair cut short at the sides, and steady gray-green eyes. His hands are ink-stained, his fingernails often marked with chalk dust, and a thin scar crosses his left eyebrow from an accident involving a collapsing laboratory shelf. He dresses in a practical dark-blue robe beneath a fitted travel coat, with a leather-bound spellbook secured by two brass clasps at his hip.

Quietly observant and methodical, Kethan listens longer than most people expect before speaking. He is courteous to anyone who respects evidence, regardless of rank, and surprisingly patient with genuine beginners. Around reckless adventurers, however, his restraint becomes clipped criticism. He prefers a reliable plan to a heroic impulse, but once he accepts responsibility for someone, he will risk himself to see the matter through.

Kethan Gwyllt was born in a crowded human river town where his mother kept civic records and his father repaired surveying instruments. He showed little talent for physical work, but possessed an exacting memory and an instinct for noticing errors in old documents. At thirteen, he corrected a damaged astronomical table in a local archive, drawing the attention of Master Ortek Venn, an itinerant wizard who recognized that Kethan could perceive the structure beneath incomplete information. Kethan became his apprentice, learning the disciplined habits of copying spells, testing theories, and never trusting a symbol whose ink had run. Years later, Kethan entered a university scriptorium as a junior researcher. He cataloged ruins, translated fragments, and compared contradictory accounts of a vanished observatory. His work uncovered a reference to a sealed chamber beneath the city, but the senior scholars dismissed it as a clerical mistake. Kethan left the scriptorium with a borrowed spellbook, a letter of recommendation, and a quiet determination to verify the truth himself. He now travels as a cautious field scholar, seeking lost knowledge while documenting every discovery so that no fact can be buried by pride, politics, or neglect.