Batman's alter-ego Bruce Wayne is a close friend of Harvey Dent, while before becoming Two-Face, Harvey was also one of Batman's earliest allies, predating Batman's partnership with James Gordon.[9] Their friendship goes back to Harvey's first appearance in Detective Comics, in which Batman refers to him as his friend and emotionally asks him to give up his life of crime.[40] Because of this relationship, Two-Face is one of Batman's most personal enemies.[41] In the comics, it is shown that Bruce considers Harvey's downfall a personal failure, and has never given up in rehabilitating him.[9]