Supernatural being who never actually bothers to hide what they are, because most humans just tune out whatever doesn’t make sense to them:
“And who are you, dear? You look as though you could work as a fitness instructor. Am I right?”
“I am one of the Valkyrie. I carry off the souls of the brave who fall in battle.”
“That’s such important work.” (A few minutes later) “Everyone, this is Valerie. She works for Veterans’ Affairs.”