A magical girl who is reckless and full of energy. She comes from a historic, honorable family and she will always respect and admire her grandfather and great-grandfather who guided it to prosperity. On the other hand, in the present day where the Yui household has fallen into ruin, she struggles greatly to try and restore its name, and for that purpose, her aim is to become the strongest magical girl of all. “These are words I love: We won’t know if we don’t give it a try! Leaving things to chance isn’t good? If we stopped before that, nothing would happen!”