Lupin is a great character but another reason why i am so facinated by him is because he is so mysterious.

here are a few mysteries about him. Does anyone know the answer to any of the questions???

What does the J. stand for in Remus. J. Lupin?
This has been answered! The "J" stands for "John".

Where does Remus live?
OoTP tells us that Remus lives at Grimmauld Place with Sirius when not away for the Order, but surely he could not have been living there before the Order was reassembled, for one thing because Sirius was still in Azkaban then. So, where has Remus been living in the past and will he continue to stay at Grimmauld Place now Sirius is gone?

What is Remus' septology mystery?
This question is bugging the authors of the Ultimate Unofficial Guide to the Mysteries of Harry Potter; they are convinced that something big will be revealed about Remus. I think they could be right, all though I don't agree with their theory about what might be revealed.

Has Remus ever killed someone?
In the pre-wolfsbane era, werewolves were actually pretty dangerous (and they still are if they forget to take their potion). In full werewolf-mode Remus could easily kill a person. He is supposed to be locked away at full moon, but who tells us that he hasn't escaped once or twice? Could this be his terrible secret?

Where are Remus' family-members?
We haven't heard anything about possible living family-members yet. Perhaps they are all dead or perhaps he has lost contact with them. But why? We do know that he is a half-blood, however.

How did Remus survive the years after James and Lily were killed, Sirius was in Azkaban and Peter was presumed death?
He must have been very lonely, because he lost all his friends in one day and being a werewolf it must have been difficult to find new friends. Did he find new friends, did Dumbledore or another Order member help him out or did he survive on his own?

What exactly is Remus' profession (if he has one)?
In book 5 Harry is confronted with choosing a future career. He is interested in being an Auror, but there are several other possibilities. We don't know anything yet about what career-path Remus has chosen for himself (assuming that he was allowed to choose). Some fans think he might be a teacher of some kind, because he already has a briefcase with in peeling letters Prof. R. J. Lupin on it in the Hogwarts Express and because teaching seems to come naturally to him.

Has Remus been in other jobs before he came to teach at Hogwarts?
We know Remus is very poor and that it is very hard for him to get a job, but it would seem impossible to live without an income for a whole twelve years (and I doubt the Wizard World has unemployment benefits). Perhaps he has had a few jobs for short periods of time. The question is: what kind of jobs and why did he leave them (i.e. did he quit himself or was he forced to leave)?