Pacifist doctor operating out of the toughest part of Gotham's criminal slums.
Leslie was the person who comforted Bruce Wayne (Batman) after his parents were murdered. She seems to have had some level of romantic relationship with Bruce's butler Alfred Pennyworth.Leslie disapproves of Batman endangering teenagers by training them to be superheroes.
As a result, before INFINITE CRISIS changed some past events in the DC universe, Leslie was also responsible for the death of Stephanie Brown (Spoiler, and briefly the fourth Robin). When Stephanie was mortally injured by Black Mask during the WAR GAMES storyline, Leslie deliberately withheld medication that could have saved Stephanie's life, in hopes that her death would finally convince Batman that superhero life was too dangerous for teenagers.
Many comics readers objected to this storyline, feeling that it was completely out of character. In any case, the INFINITE CRISIS storyline retroactively erased Leslie letting Stephanie die.
