Thaxus is a lean, wiry male tiefling with rust-red skin, swept-back black hair, and dark amber eyes that seem to measure every exit in a room. His horns curve backward close to his skull, making them easy to miss beneath his hair until he turns his head. He favors his left side when standing still, keeping his right hand free, and walks with a quiet, rolling gait that makes his footsteps difficult to place. Before speaking, he draws a slow breath through his nose, as though tasting the room. He wears well-maintained leather armor beneath a weathered charcoal cloak, with a rapier at his hip and a shortbow wrapped in oiled cloth across his back.

Thaxus is quick-witted, observant, and casually irreverent. He treats danger like a puzzle and authority like an invitation to cause trouble. Beneath his suspicious humor, he is unusually attentive to frightened people, hungry children, and anyone being cornered by someone stronger.

Thaxus Karigan grew up beneath the market bridges of a crowded river city, where children learned early that hunger was less dangerous than being noticed by the wrong adult. His infernal heritage made him an easy target for suspicion, so he survived by becoming forgettable. He carried messages, lifted purses, watched alleys, and learned which shopkeepers left their back doors unlatched. His closest companion was a small gray mouse named Copper, who lived in his coat and seemed to know when danger was coming before Thaxus did. A retired burglar eventually caught Thaxus trying to open the same lock three nights in a row. Rather than turn him in, the old thief taught him patience, proper tools, and the difference between stealing to survive and stealing because no one can stop you. Thaxus never became sentimental about the lessons, but he remembered them. Now he works as a rogue-for-hire, taking jobs that promise coin, escape, or an opportunity to embarrass someone who thinks their wealth makes them untouchable. He claims he trusts no one, yet he keeps a mental list of every hungry child and abandoned street animal he encounters, quietly helping whenever he can do so without being thanked.