A shape-shifter, Wyborn was one of the wicked children who fell to the shadow's power. He is the ancestor of the Sparks', Yewbeams and the Shellhorns. In Leopards' Gold, he was described as a scrawny six-year-old who never seemed to gain weight even though he often overate. He was a loner who longed to have friends. He had no sense of humour and absolutely no imagination, and hardly ever smiled. He was six years old when he discovered his shapeshifting endowment.