Alien

"Even after centuries around you, studying and watching you, I still come to the same conclusion, and mind my human, but, how the hell have you made it this far without total extinction?"

- Q expressing his shock at humanity's survival Alien (エイリアン, Eirian) is a term used to refer to mysterious creatures who cannot be categorized as anything already existing on Earth Land, such as humans or Demons, hence are also known as "Outsiders" (他人, Tanin), believing to exist from a completely seperate world or dimension. Very little is actually known of these "aliens", due to very few of them actually being sighted by humans and identified, from their history, culture, numbers as well as their abilities.

Trivia

 * The main inspiration for the aliens is from the Great Ones from Bloodborne as well as simple Lovecraftian lore.