Well.. I think you know what characters I have, though at current I seem to lack ideas to offer and whatnot. If she dated Sirius, though, it would not be implausible for her to also know James; and though he can be a bit of a general git I can see him getting along with her relatively well. Especially since he would be one to take up the opportunity to copy things of her ever so often -- or, that is, at least whenever Remus doesn't happen to be available for similar service. So.. He could be the shallow sort of friend, or some such; most likely mildly annoying in the sense that he would show up to palaver mainly when said needs happens to demand it.

That aside, I'm always available for plottage and ideas. You know where to find me, I think; poke me by Y!M or PM. Whichever appeals to ya^^

"Sleep; I don't need sleep, I hide my life behind me,
Dream; I keep on dreaming, My conscience lays beside me,"