To start Julie and Sidney were born in 1698-1710 they are both 12 year old twins who were murdered by their parents after they died they transferred their souls into two plushies who were named sm or shadow mangle and lm or light mangle after a couple years past they met Glitchtrap or William aka Mangles dad he asked them to help mangle and he listed things he wanted them to do and they agreed to help her so now in present time lm and sm are probably 200-300 years old and they are controlled by Glitchtrap