Andy 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, leading to a life sentence at Shawshank State Penitentiary. Throughout his time in prison, Andy demonstrates intelligence, resilience, and resourcefulness. He befriends fellow inmate Ellis "Red" Redding and uses his financial skills to help both inmates and prison staff. His ultimate goal is to escape and prove his innocence, which he accomplishes through meticulous planning and determination.