Necronomicon is the Persona of Futaba Sakura in the video game and anime series Persona 5. Unlike other Personas, Necronomicon takes the form of a UFO-like spacecraft, reflecting Futaba's interests in science fiction and mysteries. As Futaba's Persona, Necronomicon provides crucial support to the Phantom Thieves by offering reconnaissance and analysis during battles. It symbolizes Futaba's intelligence, curiosity, and her journey toward overcoming her traumatic past to become an invaluable asset to the team.