Wannyā (also known as Baumiao, a play on "Bow-meow") is a cat-like alien "sitter pet" from Otto, entrusted to take care of Ruu. He can transform into a human being (a blond man whom Mikan once liked, or a dark-red-haired woman), an animal or an object. He develops a passion for mitarashi dango (dumplings), and writes about the day's events in his computerized "sitter pet" diary. Wannyā does all the cooking and cleaning in the house. He addresses Ruu as "Ruu-chama" (most likely a combination of sama, which shows respect and chan, used as a term of endearment to children). « less