Ruby/Leah
Yeah, it's true. I mean that's all they'll tell us. SHIELD is kind of shady. I don't know if they'd tell us more than that even if they knew it. And we're all fictional in this world - there's a book that I'm in, and you're from a TV show.
Seriously. Vampires smell though so I don't think we have to worry about one sneaking up on us or anything.