It is revealed that Uma is a witch, although she is not yet adept at spell casting. She has a happy personality and finds joy in exploring the human world. When she makes a discovery about the world she quickly and proudly points it out to the other girls, however she is generally the last to discover such things and becomes disappointed when others learn faster than she does.    Source : Wikipedia

Four Netherworld Princesses have come to the human world; witch Uma, vampiress Pachira, werewolf Liru, and android Aiko. But they know nothing about human life and their mistakes make up their daily adventures. Meanwhile, the evil Dr. K-ko wants proof of the supernatural to gain admittance into the scientific elite and what better than one, or all, of the princesses -- if her plans didn&rsquo;t have a tendency to go awry.