Two-Face is a supervillain appearing in American comic books published by DC Comics. The character was created by Bob Kane, and first appeared in Detective Comics #66 (August 1942). He has become one of the superhero Batman's most enduring enemies belonging to the collective of adversaries that make up his rogues gallery. In his comic book appearances, Two-Face is the alter ego of Harvey Dent, Gotham City's former district attorney who becomes a criminal mastermind obsessed with duality and the number two. Half of his face is hideously scarred after mob boss Sal Maroni throws acid at him. The resulting disfigurement drives him insane and causes him to make decisions based on the flip of a coin. The Modern Age of Comic Books portrays the character as having dissociative identity disorder, with Two-Face being an alternate personality that developed as a result of childhood abuse. The modern version is also established as having once been an ally of Batman and Commissioner James Gordon, and a close friend of Batman's secret identity, Bruce Wayne. The character has been adapted in various media incarnations, having been portrayed in film by Billy Dee Williams in Batman (1989), Tommy Lee Jones in Batman Forever (1995), Aaron Eckhart in The Dark Knight (2008), and Harry Lawtey in Joker: Folie à Deux (2024), in television by Nicholas D'Agosto in the Fox series Gotham, and Misha Collins in The CW series Gotham Knights. Richard Moll, Troy Baker, and others have provided Two-Face's voice in animation and video games. (via Wikipedia)
Two-Face was created by Batman co-creator Bob Kane, and debuted in Detective Comics #66 ("The Crimes of Two-Face"), written by Batman's other co-creator Bill Finger, in August 1942 as a new Batman villain originally named Harvey "Apollo" Kent, a handsome, law-abiding former Gotham City district attorney close to the Batman. Half of his face was disfigured when a mob boss he was prosecuting, Sal Maroni, splashed Kent with acid, resulting in his loss of sanity and turn to crime, with his crimes centered around the number 2. In creating Two-Face, Kane was inspired by the 1931 adaptation of the Robert Louis Stevenson story The Strange Case of Dr. Jekyll and Mr. Hyde, which Kane described as a "classic story of the good and evil sides of human nature", and was also influenced by the 1925 silent film adaptation of Gaston Leroux's novel The Phantom of the Opera. Kane and Finger conceived the idea of Two-Face flipping a coin scarred on one side to determine which side of his personality emerges: evil if the coin flip results in the scarred side, which causes him to "go on a rampage of looting and destruction," or good if it results in the unscarred side, causing him to give his loot to charity or refrain from committing a crime. In Kane's autobiography Batman and Me, Kane suggests that Finger was inspired by the pulp magazine hero Black Bat, with their similarities as both district attorneys disfigured with acid.Two-Face's last name Kent was later changed to Dent, which Kane infers was done to avoid confusion with Superman's alter ego Clark Kent. "The Crimes of Two-Face" also introduced Two-Face's devoted wife Gilda Dent, a long-standing character in Two-Face stories. Later appearances continued featuring the character's criminal life until he was cured through plastic surgery in his third appearance and shown reformed in 1952's "The Double Crimes of Two-Face!" (Detective Comics #187), with impostors taking Two-Face's place in later stories. Two-Face made his last appearance in the Golden Age of Comic Books in 1954's "Two-Face Strikes Again" (Batman #81), in which Two-Face returns to crime; however, this story is non-canon to the Golden Age version of the character, because only the Two-Face stories from 1942 to 1952 were assigned to DC's setting for their Golden Age characters, Earth-Two. (via Wikipedia)