Pet Store Lady Uniqua is the owner of the "Pet-a-Store-us" shop. She sells Boy, an Apatosaurus, to Caveman Austin. Upon selling the pet, she warns Caveman Austin not to remove Boy's leash. Unfortunately, he mishears her and takes Boy's leash off, causing him to run off. Caveman Austin returns to the Pet Store Lady and tells her what happened. She then helps him retrieve Boy.
Pet Store Lady Uniqua is mostly of a pink color. She wears a purple garment that has one gray button on the left side, bearing a dino emblem, and a magenta pair of pants with lighter pink spots.
Uniqua has played Pet Store Lady Uniqua in one episode of The Backyardigans: "Caveman's Best Friend" from season three.