They all live together and get along well.

William and Elizabeth know that Michael is dead, but Vanny doesn't.

Elizabeth does NOT possess Ennard, but Ennard doesn't have a soul, they all went onto a different animatronic.

William agreed to stop killing unless he has to (If someone threatens them or attacks them)

Michael: After Elizabeth died, Mike started to bully CC for not being there for her (Mike found out about the death two days after it happened)

Elizabeth: She was an innocent young girl until she was clawed in the side of the hip and dragged into Circus baby, then died of suffocation)

William: After his wife died, he decided to murder kids.. That's it

Vanny: Yes