If you have children at Hogwarts, do you know that they could be in danger? Headmaster Dumbledore, in his wisdom, has made Remus Lupin, werewolf, the Defense against the Dark Arts teacher for your children. He was bitten at age 5 by Fenrir Greyback, and continued on to attend Hogwarts. It is noted that he was best friends with mass murderer Sirius Black and might have had something to do with the break ins.