Quote1 Now let's see if you've been naughty or, ... nice. Quote2
-- Loose Lips src

Leblanc was a small time gun runner who fell in with Penguin's crew and now works exclusively with Cobblepott. Leblanc conducts arms deals with various buyers and sellers all over the city. He fancies himself a comedian and a ladies man but he is nothing more than a common criminal who should be behind bars. Batman foiled an arms deal that Leblanc had set up. He used Leblanc to get his SIMS card from his cell phone so he could find the location of the Penguin. Later, at GCPD headquarters, Batman encountered Leblanc again while he was being interviewed. He told Batman about his disruptor that Batman needed to help him access the server room.