Left's story is quiet dark, not only because he witness the bite, but he was kicked out because people thought he killed the person who got the bite, so everyday from then on he would go to the first Freddy's location and sit outside the window, watching everyone else have fun in there while he just remembers nothing, no happiness because it was all taken away when the person who had the bite died. of course, Left got bullied for this, other people hurting him, and eventually he ran away(after years of the torment), found the new Freddy's(Pizzeria simulator) and found the Lefty suit, went inside said suit, and never took it off unless he had to. he just wanted to be free so he can be in hevan so he can see his long lost best friend.