Upon being elected as Gotham City's district attorney, the idealistic Dent dedicated himself to ridding the city of organized crime. He appears as the secondary antagonist of The Dark Knight and later as a posthumous antagonist in its sequel The Dark Knight Rises.
Harvey Dent, later known as Two-Face, is the secondary antagonist of The Dark Knight Trilogy. ~ Harvey Dent as he rants about his own vigilantism as 'Two Face'. And the only morality in a cruel world is chance.