Meet Marlin Carlos :3
 
Marlin is a smuggler and weapons dealer, being a very noticeable figure within the underground world. She has been able to find and secure all sorts of rare and dangerous items.
 
She used to server in the Equestria Royal Army, gaining some scars and losing one of her legs during her time there. After a few years, she suddenly disappeared and was assumed as MIA. Before she went missing, she took some military supplies with her as well, and sold them. Uses her contacts through various parts of the armies in Equestria in order to help smuggle items to and from her.
 
Has a partnership with another arms dealer, Dirty Bit. Marlin handles the more complicated parts of the job like contacts and handling the inventory. She is actually quite an approachable and charming mare, despite her line of work.