Harvey Dent was Gotham City’s amiable and courteous district attorney and one of Batman’s strongest allies (until Sal “Boss” Maroni threw acid in his face, hideously scarring him). It also fractured his mental state, causing him to become Two-Face, a criminal mastermind obsessed with duality and the number two and is one of Batman’s greatest enemies. His former good luck charm, a “two-headed” silver dollar with one side defaced, has been seen as a reflection of Dent’s half-scarred visage. He flips it to decide the fates of his victims. Despite Batman’s efforts to reform his former ally, Dent is consumed by his fixation on chance. His crimes are designed to prove his diametric philosophy.
Harvey Dent’s childhood consisted of hardship. Growing up under an abusive father, he developed repressed mental-illnesses of his own, such as bipolar disorder and schizophrenia. His hard work ethic, however, allowed him to rise up to become Gotham City’s youngest district attorney at the age of 26.
Dent was nicknamed “Apollo” by the media due to the fact that he was charming, good-looking, and seemingly untouchable. He was dedicated to his job of upholding law and order, and became one of the first supporters, allies, and even friends of Batman.
At the time of his job as a district attorney, the worst criminal threat in Gotham City was Carmine “the Roman” Falcone. He forged a triumvirate with Batman and Commissioner Gordon to bring the man down within the law, no matter what the cost. His slightly angrier temperament led Batman and Commissioner Gordon to develop a slight distrust for him, believing that it was slightly possible that he could be the vigilante dubbed “Holiday.” The alliance ended tragically when Sal “Boss” Maroni, believing Dent to be responsible for the death of his father, threw acid in his face during a trial. Dent was horribly scarred on the left side of his face.
Dent escaped from the hospital and descended into madness. He became obsessed with duality and opposites, and developed a second persona, the villainous Two-Face, to compliment the law & order obsessed Dent. As Two-Face, his trademark was crimes involving the number two. His obsession even shows in his clothes, which are usually composed of two halves made out of very different materials. At all times, he carries a double-sided coin with one side defaced, which he constantly flips to make any choices. Two-Face flips the coin at critical junctures: The scarred side would usually result in a crime, but the clean side would allow Two-Face to do the right thing, such as returning his loot or refraining from a murder.