Glumgoth is a gloomy background human in 101 Dalmatian Street. In her first appearance, "Dog's Best Friend," she fittingly orders black coffee in the coffee shop Dizzy and Dee Dee visit. "Doggy Da Vinci" implies that she is the owner of Portia Poodle, as she and Portia appear in a photo together posing in Da Vinci's t-shirts.
Glumgoth also appears in the background of "A Right Royal Rumble," "London, We Have a Problem," and "Yappily Ever After."