Stresa first appeared in The Elf Queen of Shannara.
As large as a small hunting dog. Appeared to be a cross between a porcupine and a cat. Barrel shaped body covered with black and tan ringed quills. Four short thick legs. Its squarish head hunched virtually neck-less between its shoulders, narrowed abruptly in to the blunt furry countenance of a cat. Wrinkled paws ended in powerful clawed fingers. A stubby quilled tail. His eyes had lids and lashes and were coloured a brilliant blue, they were not animal eyes, but human.