Nanoha Takamachi in “Is This What You Call a Mysterious Encounter?”

The first episode of the series introduces Nanoha and shows how her powers were first awakened.

Under this great big sky, there are thousands, no, tens of thousands of people. All kinds of people with all sorts of wishes and feelings hiding inside. Sometimes, a person's emotions can touch and clash with someone else's. And there's people whose feelings can bond with another so perfectly, they can talk without saying a word. Well, this is a story about people like that, and what happens when they eventually meet. Magical Girl Lyrical Nanoha is about to start!