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)
The little sister that Santa brought to Haruma. She is sweet and very innocent, all her knowledge of the world initially derived from an instruction manual she was given before her delivery to Haruma's home. Apparently the manual does not cover all situations and it is not really written for someone of Choco's level of experience. Some of the information is even quite inappropriate for someone of her age... Choco appears to be a sweet girl and is very fond of her new "onii-chan", as she immediately identified Haruma. Source: wikipedia
Age: 12 Height: 170 cm (season 1); 172 cm (season 2) Nazuna is Souta's younger sister. She is very mature for her age and is already almost as tall as Souta even though she is only in elementary school. She is often the only support Souta has in the Takanashi household.
The school nurse. She is very clumsy.
As the fifth of the five Shishido sisters, the intelligence inherited from Kagura draws the attention of many universities and serves Sakura well in designing new space colonies as well as being a general handyman as evidenced by her martial arts robot bodyguard Mr. Black Belt and several other repair jobs that she prosecutes over the course of the series. The gibberish that Sakura uses when describing and explaining things is actually a customized language that Sakura has developed. Considering that Nami is the only Shishido sibling that cannot interpret it, this customized language is most likely QT energy waves channeled through her alien partner Yuupitan whose dormancy state is as her hat and scarf. While Yuupitan can move about on his own, he is quite content to act as an extra pair of hands at Sakura's very frequent request in return for Sakura transporting him.
A first year student and Yutaka's friend and classmate, who she affectionally calls Miporin. She is also a fan of Tooru, though not quite to the extremes of Yutaka.
Ninomiya is the female protagonist in the soap opera/drama that the Minami sisters will often watch, called "Sensei and Ninomiya-kun." She is in love with Sensei in the drama.