X Day

Gaining access to the core of Futaba's Palace, the Phantoms are confronted by a monstrous cognition of Wakaba. As Futaba manages to enter the Palace herself, her Shadow encourages her to remember Wakaba's love for her, leading Futaba to realise that Wakaba's suicide note was faked by people after her research on cognitive psience. Gaining the Persona Necronomicon as a result, Futaba use its supportive abilities to help the Phantoms defeat the monster. After putting a stop to Medjed as promised, Futaba asks for Ren's help in finding out who killed Wakaba and stole her research.