Two-Face is a fictional character, a comic book supervillain who appears in comic books published by DC Comics, and is an enemy of Batman. The character first appeared in Detective Comics #66 (August 1942), and was created by Bob Kane. Two-Face was once Harvey Dent, the clean-cut district attorney of Gotham City and an ally of Batman. However, Dent goes insane after mob boss Sal Maroni throws acid at him during a trial, hideously scarring the left side of his face. Dent adopts the "Two-Face" persona and becomes a criminal, choosing to bring about good or evil based upon the outcome of a coin flip. Originally, Two-Face was one of many gimmick-focused comic book villains, plotting crimes based around the number two, such as robbing Gotham Second National Bank at 2:00 on February 2.