Ichiban Kasuga is the main protagonist of 'Ryu ga Gotoku: Like a Dragon,' a role-playing video game series. A former yakuza member, he is known for his optimism, loyalty, and strong sense of justice. After spending 18 years in prison for a crime he didn't commit to protect his boss, he finds himself betrayed and seeks to uncover the truth while rebuilding his life. Throughout the series, Ichiban evolves from a low-ranking yakuza to a leader who inspires his friends and allies, often using his charisma and determination to overcome challenges.