1. Consternation II's killer is a troubled individual that sees this run down factory as a home. You are a trespasser. His face is also just a beard and hair combo (which is probably hard to tell when in a frantic chase). He's the only human, the ghost enemies are his victims.
2. Kill. Howard. Child.
3. And VOID was just a reference to the film corruptions. Nothing more.
I'm glad you enjoyed even though the game can be difficult at times! I hope you'll play Consternation III when it releases!