Kiyo Takamine, known in the original version as Kiyomaro Takamine (高嶺 清麿, Takamine Kiyomaro) and his Mamodo (known in Japanese as a mamono (魔物, lit. "demon")) partner Zatch Bell, known in the original version as Gash Bell (ガッシュ・ベル, Gasshu Beru), are fictional characters in the anime and manga franchise Zatch Bell! by Makoto Raiku. Mamodos are beings from another world with supernatural powers. The series begins when Kiyo, by the request of his father, is told to take care of Zatch. Eventually, they become involved in a tournament between Mamodos where the winner becomes king of the Mamodo World.

Kiyo and Zatch were based on the design of a normal high school student and a noble knight who combats evil. The knight however was changed into a cuter character. In the Zatch Bell! character popularity polls, Kiyo and Zatch are voted one of the most popular characters ranking in the top three. Plush dolls based on Zatch's appearance have also been made.