Brightest witch of her age
Spoiler alert! Sirius escapes, with the help of Harry and Hermione. Remus Lupin leaves as teacher - his werewolf side does not allow him this work. That is the most important.
David Thewlis
Harry Potter, Hermione Granger, Sirius Black, Remus Lupin, Peter Pettigrew, and Ron Weasley.
Professor Remus Lupin. And Severus Snape, Albus Dumbledore, Minerva McGonagall.
Remus Lupin, The Defence Against the Dark Arts teacher in The Prisoner of Azkaban
Harry Potter, Hermione Granger, Ron Weasley, Albus Dumbledore, Sirius Black, Rubeus Hagrid, the Minister of Magic, the executioner, Scabbers, Crookshanks, Remus Lupin, and probably a few others more.
Remus Lupin's Patronus is a wolf. In "Harry Potter and the Prisoner of Azkaban," it symbolizes his connection to his werewolf nature and his struggle with the duality of his identity. The wolf Patronus reflects both his strength and his protective instincts, particularly towards his friends and students.
Remus Lupin - Moony Peter Pettigrew - Wormtail Sirius Black - Padfoot James Potter - Prongs
At school Sirius was one of the four Marauders, his best friend were James Potter, Remus Lupin and Peter Pettigrew. After Peter betrayed Sirius was no longer his friend. James was dead and Remus thought that Sirius was the reason why. However once his name was cleared Remus and Sirius became friends again.
The werewolf Professor Remus Lupin is played by David Thewlis, starting in the Prisoner of Azkaban. There is another werewolf, Fenrir Greyback, a Death Eater who is introduced in the sixth movie and played by Dave Legeno.
Remus Lupin is the werewolf, Sirius Black is an animagus and turns into a dog which bears a canny resemblance to the grim. Sorry my first edit was a mistype, was thinking of something else. Just realised ;). Thanks for the correction.
His friends called him "Prongs" because he could turn into a stag.