Freddy had summoned a demon oh so long ago that lived in the demon necklace William has now .

What happened was

William was a different person before his death

After his death he was switched with a demon.

Purple guy. A demon of satanic murder and such ( also a cute neko uwu)

William was a fallene Angel after that and hum and Freddy were at each others throats

This was no ones fault.

Freddy wanted a demon friend

But got more

He got family :)