Remus, a.k.a Moony, is a former mysterious professor and werewolf who taught Defense of the Dark Arts in the third Harry Potter book. As a character, he provides a strong and mature father figure for Harry, and his highly charming personality contrasts magnificently with the terrible werewolf he becomes every full moon. As a person, he is thoughtful and compassionate, and is always there to lend a hand. He is also very intelligent, but not without a good sense of humor.

Lupin’s strength, optimistic, and considerate personality gives him the name a “drop dead sexy werewolf ” and makes people like me swoon. FanFics usually describe him as having glowing, very intense, soulful amber eyes with soft shaggy brown hair.

AKA Moony or Professor Lupin: Hogwarts Professor of Defence Against the Dark Arts.

Sexy and utterly shaggable down-on-his-luck werewolf companion of Sirius Black and James Potter. Occasional fairy-boy and all around diamond-in-the-rough Gryffindor sex-god. Also, hands off as is betrothed to aforementioned Sirius Black

The sexiest, hottest, most gorgeous werewolf ever to walk the face of this planet only to be made hotter by the fact that he actually CARES about people. Was friends with Sirius Black, Peter Pettigrew, and James Potter (whose son you might've heard of, seeing as he's the main character in one of the most famous pieces of literature ever).

(Note: This definition is mainly about the Marauder's Era Remus, not the modern day Harry Potter Remus. Most of this information was provided by Jo Rowling herself through interviews and transcripts.)
Remus Lupin was born on March 10th, 1959. Lupin was bitten by the vicious werewolf Fenrir Greyback as a young child (some believe his age to have been around 6), thus becoming a werewolf himself. His parents tried everything but there was no cure. He and his parents were justifiably afraid he would not be able to attend school, but headmaster Albus Dumbledore allowed him to enroll at Hogwarts - as long as certain measures were taken. A house was built in Hogsmeade with a secret passage leading to it from under the Whomping Willow. Lupin was smuggled into this house for his monthly transformations to ensure his safety and the safety of others. The transformation from human to werewolf is difficult and painful, and when isolated from humans or the company of other animals, a werewolf will harm itself with its own teeth and claws out of frustration from not being able to attack. The villagers mistook Lupin's screaming as that of extremely violent ghosts. The house was dubbed "the Shrieking Shack" and became known as the most haunted building in Britain. Although the house was not really haunted at all, Dumbledore promoted this rumour to discourage curious villagers from exploring.
Remus kept his transformations a secret, but his friends James Potter

The drop dead sexy Defence Against the Dark Arts Teacher. Is kind-hearted and compansionate towards his students. Gives special care towards Harry. Becomes a werewolf every fullmoon which adds a mysterious touch to him which makes him shy at times but isnt afraid to stand by and help a friend.

the insanely adorable, chocolate-addicted werewolf/former professor in the harry potter book series.

he's sweet and intelligent, which only add to his attractiveness. he's the 'M' in MWPP. the 'M' stands for 'Moony' because he's a werewolf...

in most fanfiction, he tends to get romantically paired with Harry's godfather, Sirius Black. this happens to be my favorite fanfiction pairing.

if you consult any fangirl about his appearance, she will tell you that he has gorgeous amber eyes and long-ish, shaggy, light-brown hair. his clothes are old and have patches on them (he doesn't have much money because nobody will hire a werewolf).

oh, and he always carries this awesome kind of magical chocolate that can cure anything from headaches to dementor attacks to erectile dysfunction! :)

A rather down-on-his-luck werewolf.
JK disappointed me hugely by killing off him and Dora, somehow I don't think she made many friends doing that. He is often paired with Sirius Black in the world of fandom, but it's so likely, it may as well be canon.