Harvey Dent (Earth-4678)

"I'm thankful to the mod. They gave me a clarity; a purity few will know. Everything boils down to a simple choice. This way or that way. Good or bad."

- Two-Face

District Attorney Harvey "Harv" Dent was one of Batman's strongest allies in Gotham City, until Carmine Falcone threw acid in Dent's face, and hideously scarred him. The wounds fractured Dent's psyche, and he was reborn as Two-Face: a schizoid criminal mastermind, obsessed with duality. His former good-luck charm, a "two-headed" trick silver dollar, was damaged on one side from the attack, and Dent had seized on it as a reflection of his half-scarred visage.

Source

 * https://arkhamcity.fandom.com/wiki/Two-Face