Hear me out, hear me out. Bow's ghost is trapped in a "alive", robotic form. I know, it's stupid... BUT THINK ABOUT THE WHOLE FNAF FRANCHISE!!! The kid's spirits were trapped in the animatronics. And in the fourth closet comic book, the kids souls were trapped within circus baby's pizza. So, maybe if we reverse back in time, We can go back to when bow was basically a ghost for a whole (unfinished) season. Maybe Steve Cobs went to the haunted house place, took Bow's ghost, and trapped it in an animatronic version of the alive bow known in the show. Just think about that, for one moment...
Inanimate insanity FNAF