The Phantom, aka the Opera Ghost, aka the Trapdoor Lover, aka the Angel of Music. The man with a deformed face who haunted the Opera Populaire and terrorized its occupants, also madly in love with ingenue Christine Daae.
Main character in Gaston Leroux's novel, "The Phantom of the Opera". Also recreated by Andrew Lloyd Webber, Susan Kay, and many others.
"I am not an Angel, nor a genius, nor a ghost...I am Erik!" -Erik Destler, Gaston Leroux's "The Phantom of the Opera"