Pug

that was awakened when the power of the was unleashed. Until then, he was trapped in an endless dream. As he controls the level of power available to Tōya when he uses the Grimoire, he calls himself the Arbiter (調停者 Chōteisha). He exists in the deepest depths of Tōya's subconscious and can only be encountered while sleeping or unconscious, though the memories of any encounter will disappear upon waking. It is unknown where his existence came from, though he said it could have been born by the Magic Element from Ripper or it could have been born as a self-defense mechanism.