In Kick-Ass, Hit-Girl is the young but deadly assassin played by Chloë Grace Moretz. Her upbringing as Mindy Macready has consisted solely of training and crimefighting, and has shaped her into a cold killing machine. Mourn later.
The secret identity of Hit-Girl is eleven-year-old Mindy Macready. As an infant, she was taken away by her father, who then trained her day and night to be a lethal assassin. Mindy likes Hello Kitty, Clint Eastwood, and guns.