Mirionette is bored out of her Mind,
the other animatronics avoid her like a plaque and wont plqy with her, Children laugh or get scared at the sight of her and it makes her Sad, lonely and most of all, Bored
So when she stumbled over a Secret room, located near her Station that nobody ever thought to find in such a place, the room was full of Parts and seemed to be Materials for creating a seemed to be a Half-Done animatronic,
she realized it was a similar yet far to her own the moment she found the blueprint, She was filled with Happines(As far as her hallow soul reach) when she found out a particular content on thr blueprint
'Mione, Mirionette's Daughter'