Even though they were animatronics, that didn't mean that none of them could talk. Everyone seemed to have been brought to life in the same way. Killed by the purple figure, soul becomes trapped in suit, and eventually all search for revenge.
"Who is the purple man?" Freddie asked Bonnie
"His name is William Afton, he killed us all, we found his badge which told us everything"
"But why is?"
"Because we were easy targets, that's why we must kill all security guards until we finally have our revenge on him, then all our souls will be released to peace"
It all seemed to now make sense to Freddie, she started remembering things like her family, friends, and even Joey more frequently.
"All security must be found and killed at night until William is found" said Bonnie.
Those who escaped at night were extremely lucky but wouldn't be the next time.
Night after night they lured the security guards in, it never helped that their uniforms were purple. But none of their badges listed the same name as William Afton.
"When will we finally be free?" Muttered Chica.
She was only nine years old when the purple man offered her to meet the animatronics, but instead he trapped her soul in her favorite animatronic.
Same thing had happened to Bonnie and the rest of the gang.
They were all dead but souls still trapped.