The Legislator, whose name is Rippō, is a powerful and influential yōkai in the world of The Morose Mononokean. He serves as one of the three highest authorities in the Underworld, alongside the other heads known as Justice and the Executive. His primary role is to establish and enforce the rules that govern the Underworld, and he resides in a location called Newt Lake. The Legislator acts as the direct superior of Haruitsuki Abeno, the master of the Mononokean, and is the only figure with the authority to give Abeno direct orders that must be obeyed. As the Legislator, he oversees the operations of the Mononokean and holds a position of significant responsibility and power within the yōkai hierarchy. His position as a rule-maker makes him a figure of authority and order, though his specific personality traits and personal motivations are not extensively detailed. His key relationships primarily involve the other two heads of the Underworld and his subordinate, Haruitsuki Abeno. He does not undergo major personal development in the story, and his function remains largely that of a governing figure. His notable ability is the authority to command the master of the Mononokean and to set the laws of the Underworld.