Remus is a half blood wizard. He went to Hogwarts and was one of the creators of the Madauder's Map.
After Peter Pettigrew betrayed the Potter's, Remus lost all of his closest friends due to the First Wizarding War.
He later was able to reconnect with one of his best friends Sirius Black.
He later became a professor at Hogwarts teaching Defence Against the Dark Arts.