Halloween // Costume Ideas for « Opposites attract »

Hey,!I’m going to a themed party and the theme is « Opposites attract ». The costume is done by duos, I’m a average size fit dark hair guy and my duo is a slim brunette tall girl. We want to stand out, be recognizable but I don’t want the costumes to be too hard to make/buy. Any help would be appreciated, give me your best ideas 😁