Nyaruko "Nyarlathotep, Nyarlko"

People come in all shapes and sizes. Short and tall, young and old, and sometimes with wings or a tail. Just because she's a monster girl, it doesn't mean she can't show you some love.

This isn't Roswell and they aren't little green men, but anime is full of aliens who have come down from the stars above. Some are benevolent while others are malicious, and all will make the human race question their role in the universe.