Uma, born in 1990, is the fifth prince of the Hippo country. While most hippos are purple-gray or taupe，with rounded ears, Uma is blue-gray with pointed ears, a mutation that grants him some special abilities. When he grew up, he immigrated to the United Nations to start his own business. This is a world where humans, animals, and animal-beings. Each species has its own country, and the country where all creatures coexist is called the United Nations. It is an equal, advanced, open country which is full of possibilities. The character setting is derived from the profile picture which is a hippopotamus of the company boss. Its lively and lovely movements are reminiscent of the humanoid hippopotamus, so there is this character.