At this point, yeah. Their IRL faces are almost all known by this point. The only one I am curious about, now, is Subaru, but not enough to go on some sort of tear through Japanese pages and Twitters to try to figure it out anymore.
Miko having done amateur cam porn is not surprising, given how horny she seems to be. She doesn't play it up like Marine but it is obvious enough, what with the fact that it's common knowledge she plays eroge and stuff. The great irony of all this is she's a miko, a shrine maiden, which is where she gets her name. It's probably lost on most people these days but "maiden' pretty much means "virgin" and implies sexual innocence (and I'm pretty sure otome, "maiden" in Japanese, also implies virginity). In Shinto, shrine maidens are supposed to be sexually pure so they can channel the kami and stuff. Meanwhile, there ain't all that much innocence surrounding Miko, and the disconnect (the "gap" as they say) generates much of the humor. I'm kind of surprised gachikoi and antis haven't gone after her but this just goes to show how lazy they are and how they only really target low-hanging fruit, most of the time.
EDIT: She probably dodges the bullet by focusing on the les angle, now that I think of it.