Remains of creation

in the sewers, Gregory finds an old battered animatronic who activates. strangely, he doesn't run on battery or needs to charge every hour, just who is this faceless broken blue rabbit who helps him, and why does Freddy recognize him? OR: I put ignited bonnie in FNAF SB, Aka, my twist on bringing bonnie back. loosely based on a concept by Emblem Creations on Ao3, so check em out!