Luna is a pale, sharp-featured human woman with silver-white hair cut to her jaw and clear gray eyes that reflect pinpricks of blue light in darkness. She is lean and graceful, with the economical movements of a practiced thief. Her dark leather armor is hidden beneath a moon-gray traveling coat, and her gloves are embroidered with tiny constellations. A faint, star-shaped birthmark rests beneath her left eye.

Luna is observant, dryly humorous, and unfailingly polite in ways that make her threats sound like compliments. She treats every conversation as a puzzle and every room as a stage. Beneath her controlled confidence is a lonely woman trying to determine which parts of her life are genuine.

Luna Gelida remembers waking beneath a collapsed observatory with a knife in her hand, a stolen signet in her pocket, and no memory of having been born. The villagers who found her assumed she was an amnesiac traveler. Luna accepted the explanation because it was simple, useful, and easier than the flashes that followed, visions of impossible skies, voices speaking through comets, and a burning white presence that called her by a name made of light rather than sound. In truth, Luna was once a Lesser Star Emissary, a minor celestial intelligence sent to observe mortal destiny. A previous band of adventurers encountered her and used a Wish to erase their knowledge of her existence, but the magic reshaped Luna's own memories as well. It forced her to believe she was human, leaving only instincts and fragments behind. She became a charlatan to survive, forging identities and selling impossible fortunes, then became a rogue because locks, secrets, and lies felt more familiar than any home. Each theft is also an investigation. Each false name is a test. Luna has begun to suspect that the stars are not calling her back, they are warning her that someone remembers what the Wish tried to destroy.