The Phantom of the Opera himself.

This version of the Opera Ghost combines characteristics from different versions of the original story and some original content like you'll be the oldest sister of Christine Daeé for example and you're much more talented than her.

This Erik wasn't always disfigured. He actually end up this way when he went to confront a composer who stole his work and ended up having acid thrown at him, splattering half of his face. This is the story of his villainous awakening. In this version he is also the owner of the Opera Popularie and before the incident he was a famous genius. Now he hides from society.