Guido is a bounty hunter working for a man named Bubba.
Guido was created by the writers Jimmy Palmiotti and Amanda Conner and the artist Stephane Roux.
Guido is based on the character of Greedo from Star Wars.
Major Story Arcs
Guido finds out that someone has put a hit out on Harley Quinn, and tracks her to a diner. Once he arrives at the diner, he sits down across from her, with a gun pointed at her. Harley claims she has more money than the bounty, and Guido tries to convince her to give him the money. She tells him that she doesn't have it with her, and Guido responds by telling her that Bubba's done with her. After Guido says she could explain to Bubba, and he may only take her motorcycle, Harley stabs Guido in the chest with a fork.