In some ancient civilizations the Wolf was a symbol of the underworld. In Egypt, the guardian of the dead was Anubis who was a wolf-headed god. The jackal portrayed as black was the symbol of both death and regeneration.
William is also the one who hid inside the suits and kidnapped and killed children, leading to the assumption that William Afton is The Purple Guy of FNaF 2 and 3 (he is killed at the end of the book when Charlie sets off the spring locks in his suit).
Fozzie is an orange-brown bear who often wears a brown pork pie hat and a red-and-white polka-dot necktie. Shortly after telling the joke, he was usually the target of ridicule, particularly from balcony hecklers Statler and Waldorf. Fozzie's characterization was developed by Frank Oz, who performed Fozzie until 2000.