The First Evil is a fictional entity from the television series Buffy the Vampire Slayer. It represents the original source of all evil in the universe, existing before humanity and all other forms of life. The First Evil can take on the appearance of deceased individuals, manipulating others by exploiting their fears and desires. In the series, The First Evil serves as the primary antagonist during the seventh season. It seeks to destroy Buffy Summers and her allies, known as the Slayers. The character embodies themes of darkness and temptation, challenging the protagonists to confront their inner struggles and fears.