Professor Remus John Lupin, O.M. (First Class), (10 March, 1960 - 2 May, 1998), also known as Moony, was a half-blood wizard and the only son of Lyall and Hope Lupin (nee Howell). He was afflicted with lycanthropy during his childhood, as a result of Fenrir Greyback's revenge against Lyall. He attended Hogwarts School of Witchcraft and Wizardry from 1971-1978 and was Sorted into Gryffindor House. During his school years he was one of the Marauders, best friends with Sirius Black, James Potter, and Peter Pettigrew. Together they created the Marauder's Map.
After Hogwarts, Remus and his friends joined the original Order of the Phoenix and fought in the First Wizarding War. However, Pettigrew betrayed James and Lily Potter to Lord Voldemort a week after he was made the couples' Secret Keeper. Thus Remus had lost all of his closest friends in various ways by the end of the First Wizarding War. The loss of his friends devastated him, though he and Sirius Black later rekindled their friendship.
Remus taught at Hogwarts School of Witchcraft and Wizardry as Professor of Defence Against the Dark Arts during the 1993-1994 school year. Remus was regarding by students to be the best Defence teacher they have had thus far. He was also a professor of Harry Potter (James' son) whom he taught how to conjure a corporeal Patronus, but resigned after Severus Snape revealed to the public that Remus was a werewolf.
He fought against Death Eaters once more in the Second Wizarding War, during which he lost his friend Sirius. In 1997, Remus married fellow Order member Nymphadora Tonks and had a son, Edward Remus Lupin, of whom he named Harry the godfather. Remus fought at the Battle of Hogwarts on 2 May, 1998, during which his wife was murdered by Bellatrix Lestrange. Remus was also murdered by Death Eater, Antonin Dolohov, during the first half of the same battle. His death was avenged by Filius Flitwick.
Remus briefly appeared again through the Resurrection Stone for Harry, along with James Potter, Lily Potter, and Sirius Black in 1998. After his death his son was raised by Andromeda Tonks and Harry Potter.