The Principle of Evil Made Flesh is a concept from the Buffy the Vampire Slayer television series, representing the embodiment of pure evil. This character, known as The First Evil, seeks to manipulate and destroy the forces of good, often targeting the show's protagonists, particularly Buffy Summers. This entity is unique because it can take on the appearance of deceased characters, using their forms to instill fear and confusion. The Principle of Evil Made Flesh serves as a central antagonist, highlighting the struggle between good and evil throughout the series, and emphasizing the moral complexities faced by the characters.