Yarvi is a fictional character from the fantasy novel "Half a King" by Joe Abercrombie. He is the youngest son of a king in the North and is initially portrayed as weak and physically disabled, with a deformed hand. Despite his challenges, Yarvi possesses intelligence and resilience, which drive his journey throughout the story. As the plot unfolds, Yarvi is thrust into a world of political intrigue and betrayal after his father's death. He must navigate complex relationships and dangerous situations, ultimately discovering his own strength and capabilities. His character development is central to the themes of power and identity in the novel.