Detective Roy Coleman of the Chicago Police Department is a close friend of Rally Vincent. The two often exchange tips and leads, and he occassionally helps smooth over legal difficutlies when Rally gets caught in a bind while on a job. He is an honest cop and while he may occassionally overlook a regulation or two for the bountyhunters of the Gunsmith Cats store, he would never consider breaking the law for them or anyone.    Source:BESM

Rally Vincent knows her weapons well, while her partner Minne May Hopkins loves to play with explosives. The pair run a gun-shop illegally and one day Bill Collins of the ATF, blackmails Rally and Minnie May into working for the ATF. Little do they know, that they are getting involved in a mission larger than they could imagine. 
(Source: Anime News Network)

Meet Rally and Mini-May, two of the most fun-loving, well-armed, bounty-hunting women in Chicago! Whether they're chasing bail jumpers or fending off the Mob, you can bet on a healthy supply of guns, bombs, car chases, and more guns!
 
Rally is assigned to track down a bail-jumping informant whose testimony could severely damage the Mob. Unfortunately, the Mob is onto him, and the meanest, toughest bad-girl hitwoman in the Windy City is all too willing to "ventilate" our heroines to get to the stool pigeon! (Source: Dark Horse)