The Voices (Zero Creepypasta Fanfic)

As a child, Alice Jackson created an imaginary friend, named Zero. When her parents were killed in a car accident as a result of Zero's distractions, Alice tried to push away her imaginary friend. But as she got older, Zero became more independent and ruthless, eventually taking over Alice's mind and body, and killing many people. Zero has just arrived at the Creepypasta mansion. She was brought in by Slenderman because her killing sprees were getting out of control. He wanted to bring her in and keep her there until she calmed down a little, and then let her find her own place.
But.
Alice is still screaming from inside Zero's mind. It is driving her crazy. All she wants is to leave the mansion and be alone again, away from the stupidly obnoxious and annoying Creepypastas. But she cannot leave until Alice is completely erased from her mind. And that is going to take a lot of help and experimenting, especially with Zero's unlimited thirst for blood...