Duela Dent comes to Gotham wearing Joker's face as a mask and claiming that she is the Joker's Daughter. The insane antics of the Joker's Daughter are displayed with her Lipstick Gun, Acrobatics and Discourage abilities. Duela Dent is quite a mystery, claiming to be various villains' offspring but right now she's siding with Mr. J.
Joker's Daughter is a Sidekick for the Joker. You cannot hire her and Harley Quinn at the same time due to Aversion.