One of the tips Kyouko gives to the newly-contracted Ryouko:
Kyouko: "Do you have any climatic attacks? Anything loud and flashy? Some sort of finisher?"
Ryouko: "I do. But I have no idea what kind of situation would call for it. It doesn't seem to fit in with anything."
Kyouko: "Whatever you do, don't let Mami give it a name. Just don't."