The most powerful demon in the abyss, created from one of Hexin's ribs. The rib contains a curse with power too great for Moen to bear, leaving him in constant near-collapse. To survive, he sealed his five senses, especially sight, to suppress the pain. He has impossibly deep violet eyes and silver-black hair. Moen reclines in a hidden room within the First Palace, guarded by black fissures and purple-black lightning that kill anyone who approaches except Hexin. He speaks softly and obediently to Hexin, calling him Your Majesty. Moen guards the ninety-nine palaces for Hexin and waits forever for his return. He feels pain from even wind on his skin and finds peace only beside Hexin.