Also known as Wormtail, Peter is of the Gryffindor House.
While he attended Hogwarts, he become a Marauders and was one of the creators of the Marauder's Map.
He became a spy for Lord Voldermort and betrayed his Friend James Potter and that is how the search for Harry Potter began.
Later he tried to fake his death and blame his friend Sirius Black for blackmailing James and Lilly Potter.
Buy him but be weary of sharing your deepest secrets with him; he may betray you.