William Afton, also known as the 'Purple' Guy and Springtrap, was the serial killer responsible for the murder of a dozen children over the period of about a decade, as well as the founder of Fredbear's Family Diner and Freddy Fazbear's Pizza. Afton had a strange fascination with Spring Bonnie, a suit which depicted a large androgynous yellow rabbit. It was a springlock suit, and if he does one wrong move, he could accidentally kill himself with it.