23rd Oct: It's time for the second TV Tropes Halloween Avatar Contest, theme: cute monsters! Details and voting here.
"He was a candidate for a Midwestern congressional seat, and he hired me to manage his campaign advertising. Unfortunately, his opponent turned up something in his past with which we could not cope."A character of extraterrestrial origins. For tropes about what makes them alien, see Bizarre Alien Biology. If you thought it meant "illegal aliens" and signed up, click Race Tropes. For interspecies romantic or sexual interactions, see the Interracial And Interspecies Love Index. If there are no aliens at all, see Absent Aliens. Not to be confused with Otherness Tropes, though there may be some overlap.
"Let me guess: he was secretly a liberal."
"Worse. An alien."
"You're kidding?! An undocumented alien running for—"
"No. A space alien, Ms. Walters."
— Sensational She-Hulk #11, Jan. 1990
TropesLevels of the ladder of alien strangeness: