Fnaf belongs to Scott Cawthon. Enjoy!
It doesn't matter that she's mangled. In fact, she'd give anything right now to have those kids tearing her limb from limb right now if it meant this wasn't happening. Guess you don't know how much you love them until they're gone. The thing was, Mangle loved the kids no matter how much they tore her apart. Programming had nothing to do with it; she truly loved them with the heart that she didn't have. After all, they were only children. They didn't understand it.
If only Fredbear hadn't done what he did, and it would still be like that.