Mr. Dufresne is a fictional character from the novella "Rita Hayworth and Shawshank Redemption" by Stephen King. He is a banker who is wrongfully convicted of murdering his wife and her lover. Throughout his time in Shawshank State Penitentiary, he demonstrates intelligence, resilience, and a strong sense of hope. In prison, Mr. Dufresne befriends fellow inmate Ellis "Red" Redding and uses his financial skills to help improve the prison's operations. His efforts lead to significant changes within the prison, showcasing his ability to adapt and influence his surroundings despite the harsh conditions of incarceration.