Aporia can be found on the field after the player finishes the normal stories of Leo and Luna as well as Jack's.
A mysterious gigantic man who seems to have come from the future.
Calls himself the Guardian of Despair.
He appeared when Jose, Placido and Lucciano all combined into a single entity.
As the world in the future was ruined by the Moment reactor going out of control, during his childhood, he lost his parents to a Meklord Emperor's attack, and as he mourned for them, he experienced the despair of losing the ones who loved him. As a young adult, he lost his beloved while they fought against the berserk machines, experiencing the despair of losing the ones he loved. And as an old man, a survivor of it all, he came to believe humanity was wiped out by their own machines, and despaired as he believed there would be no one to love.
As he was about to die, he was found by Z-one, and they joined forces in order to find a way to avert the destruction the mankind. But after many years, no matter how many experiments they carried out, their reality was still unchanged. During his last moments, he begged Z-one to create robots based on his childhood, his early adulthood and his old years, and send them to the past as Z-one's servants.
Those are, respectively, the origins of Lucciano, Placido and Jose, and their combination recreated him in this form.
Uses Decks based on Machine-Type "Meklord" monster cards.
His ace monster is Meklord Astro Mekanikle.