Two-Face is one of the Blind Bag characters in Lego Dimensions 2: The Rise of Enoch, from the DCAU franchise.
Harvey Dent was Gotham's DA, a close friend of Bruce Wayne and the fiancee to Grace Lamont. In private however, Harvey suffered with split personalities due to having repressed all of his dark personality traits since childhood. Eventually Harvey's enemy Rupert Thorne who was a powerful crime-lord in Gotham caught wind of this and attempted to blackmail the DA only for Harvey's dark personality to surface and attack him. The fight took them to a power-generator room in Thorne's power-plant where a stray bullet caused an explosion that scarred half of his body.
Following this, Harvey turned evil and became the villain Two-Face as he used his knowledge of Gotham's legal-system and criminal-underworld to become a gangster himself who rivalled Rupert Thorne.