Llewellyn Moss is a fictional character from the novel "No Country for Old Men," written by Cormac McCarthy. He is a Vietnam War veteran who stumbles upon a drug deal gone wrong in the Texas desert, discovering a briefcase filled with cash. Moss's decision to take the money sets off a violent chain of events, as he becomes the target of a relentless hitman. Moss is portrayed as resourceful and determined, using his survival skills to evade danger. His character embodies themes of morality and the consequences of choices, reflecting the broader conflicts present in the story, including the nature of violence and fate.