The Black Rats, as the name suggests, are a gang of giant rats, who like to steal treasure. They serve as antagonists in the show.
The Black Rats all look similar, just with different colored masks. They each are black, have small pink noses, 2 buck teeth, and a silver chest piece as armor with chainmail undercoating.
The Black Rats are often mischievous, and like to steal treasure, namely Epic's treasure. They seem to be hostile to everyone but their own kind.