"Harley Quinn & Associate: Badass Motherfuckers," or simply referred to "Harley Quinn and Associates," is a contract mercenary team founded and comprised of Harley Quinn and her apprentice, Cassandra Cain, offering their services to the highest bidder.
Defeating Black Mask
After Cassandra Cain stole the Bertinelli diamond from Roman Sionis, Harley Quinn was tasked with finding her and getting it in exchange for her life. However, Harley quickly grew attached to Cass, and the two formed a close bond very quickly. After killing Black Mask with the help of the Birds of Prey, Harley and Cass went off on their own to start a gun-for-hire business as contractable mercenaries, even getting business cards for it.
- Hodson, Christina (writer) & Yan, Cathy (director) (February 7, 2020). Birds of Prey (And the Fantabulous Emancipation of One Harley Quinn).