Peter Pettigrew

 Many prophets preach on bended knee
Many clerics wasted wine
Through those bloody sheets
On those cardboard streets
I have wasted time

 Peter Pettigrew started at Hogwarts the same time as Sirius Black, Remus Lupin, and James Potter. Together with the three of them, he was sorted into Gryffindor and formed a group of friends called the "Marauders" and learned to become an Animagus. Peter's Animagus form was a rat and so he went by the name Wormtail.