Monster princesses that rule over “Ryugujo” which exist at the bottom of the sea in the Zipangu region. They are treated as mermaids, but they're actually a kind of powerful dragon that possesses the power to manipulate sea currents and cause tsunamis. Depending on the area, they are worshiped as gods of the ocean. They are selfish and overbearing, but also have tolerant and easy-going personalities.