Blackie O'Reilly was the madame of One Eyed Jack's, the casino/brothel just north of the Canadian border. Known as "The Black Rose", she ran Jack's at the behest of its secret owner, Benjamin Horne. In keeping with the "upscale" theme of the establishment, Blackie adorned herself in glamorous black evening gowns and exuded an air of sophistication and being a member of the "upper class." She was the highest authority at Jack's, aside from Ben Horne, eliciting absolute obedience from the cadre of prostitutes in her stable. Whenever a new girl was hired, she oversaw a coin-tossing ceremony between Ben and Jerry Horne to see which man would "break her in."