Sakura Shishidou

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.