Sounds about like normal Changeling to me! Being a sin-eater doesn't grant any kind of magesight or anything beyond being able to see the Twilight and ghosts, so he's just going to look like normal pretty much always, I'd think.

Lauren, similarly, just looks like a normal, if perhaps slightly out of place, twenty-something woman who is only mildly perturbed by the glowing doorway. The wolf would probably be more unsettling, she'd focus on that more than anything else.