Lol Gamepat. I don't think I know everything....
My answer is this....I saw it in a walkthrough, an official one made by capcom. They call it that, its the official name stated in an RE4 interview a few years back. They in a sick way, were like maidens, untouched, and they healed themselves in hurt, put spikes in them, and there ya go.
Great, I'm moving. Who knows when you'll see me again.