Sweeney Todd is a dark, cold, and vengeful man driven entirely by the wrongful ruin of his family. Key aspects of his personality include his obsessive revenge, his deep despair, and his cold cruelty.Transformation and DespairBefore his exile, Benjamin Barker was a loving husband and a hopeful barber. When Judge Turpin falsely accuses him and steals his wife and child, his kind nature dies. He returns to London as Sweeney Todd, a broken shell of a man. He feels no joy and views the world as a cruel place where everyone eventually preys on everyone else.Obsession and CrueltyHis entire focus centers on killing Judge Turpin. This single goal blinds him to everything else, turning him into a cold and heartless killer. When he fails to reach the judge right away, his anger spills over onto innocent people. He starts killing his customers out of pure hate and disgust for humanity, using Mrs. Lovett’s pie shop to hide the bodies without any remorse.Isolation and MadnessTodd pushes away anyone who tries to care for him. He treats Mrs. Lovett as a partner in crime rather than a friend.