Nina039s pet cat Rio called 039Leo039 in the English translation of the manga can change into the form of a little boy with a magic candy. In the anime all he has to do is a flip and he becomes human. In the anime he starts to like Ayu039s dog Tamako. His seiy in the TV series was Reiko Takagi. In Geneon039s English dub he was voiced by an uncredited Mona Marshall. Source Wikipedia.