She is a lavender colored fish with blonde hair. She wears a white shirt with a big gold badge on it, blue pants, black shoes, and a blue police hat.
She and her partner, who is usually Officer John Slugfish, have a large role in "Nasty Patty." Mr. Krabs gives her a soda but forgets to give her ice. Then, when she hits the Health Inspector in the head with a barrel, her first name is revealed. When she arrests SpongeBob for not inviting her to his party in "Party Pooper Pants," her last name is also revealed. Nancy's six partners include Officer John Slugfish, Officer Rob, the yellow officer, a purple one (males), a female green officer with orange curly hair (appears only in the ending of "No Free Rides" and "Goo Goo Gas"), and her twin sister Marcie, who only appears in "Patty Caper." She looks similar to Nancy except that she is green and has red hair. SpongeBob later calls her to arrest the Tattletale Strangler (unfortunately, the Strangler escaped once again). She is happy when SpongeBob "puts" the Strangler in jail (the strangler does it by himself and is with Patrick).
Officer Nancy is one of the characters to whom SpongeBob can talk to and whom he can help (such as delivering packages for Squidward and completing her patty that does not have a pickle). She has a fish tail in the game, and when the player talks to her, her picture is shown in which she has dark purple skin and has orange hair.