Summary[]
The burnt animatronics are the souls of the missing kids that were killed by William. They would soon go after him in a attempt to kill him so that they could free their souls.
Background[]
During the Events of Final Nights 3 William killed 5 kids it's unknown why he did though. Soon after he killed the kids he would hide their bodies into the mascots of the restaurant. After purple guy did this he would soon have the location closed down due to police and other law enforcement members shutting down the restaurant due to the incident. In the events of Final Nights 3 they would be burned but not destroyed and William would then have the robots shipped to him since he owned the robots and the franchise. During the night the robots would be possessed and try to kill William sadly for them they failed but William would try and end it all by going to the restaurant and destroying the robots that were there. He would fail and end up turning into Springtrap.
Personality[]
From what we known the kids used to be very happy and child like just like most children; after they were killed they became vengeful souls who only want vengeance against their killer. They are willing to go any length to achieve this goal and other than that not much else is known about the souls that control the robots.