Marionette 2.0 is a creation of Marsha to replace the old Marioneete, which she destroyed.
Marionette 2.0 was created by Marsha in "Five Nights". Due to the dangerous nature of the replica of the original Marionette, Marsha created a device that could keep the Marionette calm and controllable.
With the device on, Marionette 2.0 is a calm and level-headed character. She talks in a rather sooting manner. Without her device, she is a savage and hostile person who will lash out at anyone.
She seem sto find confrot in music, specifically one song, Sleepy Puppies. The device was built with this song in a loop, since it was the only song used during the creation of Marionette 2.o