Yaldabaoth

Yaldaboth, also known as the Holy Grail, is the true antagonist and final boss of Persona 5. He is the manifestation of humanity's wish for order and control, and considers himself to be a god.

Biography
Yaldabaoth is the manifestation of humanity's desire for order and control, which he believes can only be fulfilled with him ruling over the world and forbidding anyone to think for themselves. Before the events of the game, he invaded the Velvet Room, imprisoning Igor and assuming his idnetity; additionally, he split Igor's assistant, Lavenza, into two amnesiac twins, Caroline and Justine.

Throughout the majority of the game, 'Igor' assists the protagonist as he did in previous installments, but alert players will notice that something is not quite right about the master of the Velvet Room; he now speaks in a deep and menacing voice, and he seems noticably dismissive and cold regarding the protagonist and humanity as a whole. Additionally, he refers to the Velvet Room as belonging to him, which Igor had never done before, and he relys on Caroline and Justine to perform Persona fusions instead of doing so himself.