Katrina Stoneheart is the main antagonist of the TV show Pound Puppies. She is an evil woman who got most of Millicent Trueblood's fortune.
She often makes Holly work for her and do the chores she and Brattina's should have done. She displays an immeasurable distaste for the Pound Puppies, and all things cute in general. Her main goal in Season 1 was to shut down the puppy pound. In season 2, her main goal shifted to capturing Cooler and the Pound Puppies and locking them up or even killing them. In Season 1, Katrina was shown to be clever, manipulative and sneaky, but in Season 2, she seemed to be far less competent.