Impurity

An Impurity (ケガレ) is a monster that resides in Magano and breaks into the human world to abduct and kill humans. If one of them is able to kill enough exorcists and absorb their power, they evolve into a Basara. They are the main enemies of the Exorcists.

Origin
It is unknown when and where they come into existence. It is said that Impurities have existed since the beginning of time. Furthermore, it is said that they are born from the depths of people's sins and karma.

Appearance
While they vary greatly in overall appearance and size, Impurities have dark skin and a kuji-kiri on their torsos.