It also applies for unique shops

Many, many plots disregard it with cheerful abandon. This can be justified if the plot involves an Ancient Conspiracy, Government Conspiracy, or similar antagonist with major ability to operate behind the scenes that makes the character question each and every occurence. The existence of a powerful, secretive, and malicious cabal makes for juicier storytelling than

Breakout Character: The Penguins

In some cases it is even possible that the external signs of the alien heritage do not manifest before adulthood. Not a pleasant discovery when you are « executioner of Terminus, scourge of the alien, and Torquemada’s right hand man ». Heel Realization: At one point, Torquemada meets his historical namesake (and one of his reincarnations) through