Kazuma Kiryu is the main protagonist of the Ryu ga Gotoku series, also known as Yakuza in the West. He is a former yakuza and a legendary figure within the Tojo Clan, often referred to as the 'Dragon of Dojima'. Kiryu is known for his strong sense of justice, loyalty, and unwavering moral compass. Despite his past ties to the criminal underworld, he consistently seeks a peaceful life while protecting those he cares about. Throughout the series, Kiryu navigates the complexities of the yakuza world, often finding himself in conflicts that require his exceptional fighting skills and strategic thinking.