As you all know William is half demon half Angel..

In heaven he was the most beautiful

Until the others became jealous and they ganged up in him and tore his wing

He became a bad kid so they banned him and sent him to hell

Where they tore his good wing off and raped him

He then grew a demon wing

He became a pushover in hell, and they tore his demon wing as well...he becamw flightless...