Uma

It is revealed that Uma is a witch although she is not yet adept at spell casting due to her being a "third rate alchemist." 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 only to be generally the last to discover such things becoming disappointed when others learn faster than she does. When she is not trying to master spells, Uma reads romance manga. Sometimes when Uma is casting a spell, her skirt lifts up revealing her panties. Her overall design is reminiscent of a rabbit-girl ranging from her hair style that occasionally moves, her pet rabbit-like creatures, and the carrot cushion that she sleeps with.

(Source: Wikipedia)