Loopey McQuack is Launchpad McQuack's sister. She, her mother, and her father make up a team of stunt-pilots called the Flying McQuacks. It appears they make their living traveling to different air shows, preforming stunts. She makes her first appearance in DuckTales when the The Flying McQuacks are coming to Duckburg for an air show, where Launchpad is flying an experimental jet.
Loopey first appeared in the DuckTales episode, "Top Duck", in which she, along with the rest of the McQuack family, save Scrooge McDuck's money bin from the Beagle Boys.
Loopey also makes a cameo appearance in the episode "Till Nephews Do Us Part", during the wedding scene.