Mallshav is a lean, quick-moving tiefling with deep wine-red skin, swept-back black horns, a long expressive tail, and amber-gold eyes. His dark hair is cut unevenly around his horns, and small brass rings decorate one horn. He dresses in worn but carefully mended leather armor beneath a faded blue-green coat, with a rapier at his hip and a battered lute strapped across his back. His voice is warm and musical, but before speaking he often takes a soft, audible breath through his teeth. When nervous, that breath becomes quick and shallow, and his words tumble out in hurried little bursts.

Mallshav is quick-witted, theatrical, and intensely observant. He notices who is being ignored in a room and usually directs his first joke toward them. He treats conversation like a performance, but his humor becomes gentler around children, servants, and anyone who has been made to feel small. He is brave in a crisis, though afterward he insists he was never afraid and gives a breathless, overcomplicated explanation of his plan.

Mallshav grew up beneath the market bridges of a crowded river city, where he learned that a good song could earn more than a quick hand, and a convincing lie could earn more than either. Other street children called him Mallshav because he was always humming nonsense syllables while he worked. The name stuck, partly because his real family name had been lost with the only people who knew it. His infernal appearance made him an easy target for suspicion, so he learned to turn attention into entertainment. He played for merchants, mimicked guards, and invented elaborate stories about nobles who had supposedly hired him for secret performances. An aging tavern musician eventually noticed that Mallshav possessed a remarkable ear and an instinct for finding the emotional weakness in a crowd. She taught him the basics of the lute, stagecraft, and the dangerous art of making magic ride upon a spoken word. Mallshav still sleeps lightly, keeps one hand near his knife, and never passes a hungry child without sharing food. He became an adventurer because the streets taught him that no one survives alone, and because he believes somewhere beyond the city there may be a person who remembers where he came from. Until he finds that person, he intends to make himself impossible to forget.