Touko Aoyama

Professor Utonium and his son Ken are studying the strange Chemical X. When a mochi cake falls into the formula, it changes into Chemical Z. Ken fires a ray of Chemical Z at a glacier in Tokyo Bay, however that causes strange lights to scatter, some of them aim at three normal girls, Momoko, Miyako, and Kaoru. This gives them the power to transform into superheroes, the Powerpuff Girls Z!

Hōzuki is the aide to the great king of Hell, King Enma. Calm and super-sadistic, Hōzuki tries to resolve the various problems in Hell, including a rampaging Momotarō and his companions. However, he also likes spending his free time on his hobbies, such as fawning over cute animals and raising "Goldfish Flowers."