Wait— "Sentient or playable villains/monsters are not applicable (e.g. Hollows from Bleach are fine, Espada are not)."

So, would These be disallowed, then?

I mean, functionally, they're just. Creepy alien bugs, not really acting in the building-of-infrastructure or communicating-with-people order of things. You could argue it either way, is what I'm sayin'.