The main character of Mahou Shoujo Lyrical Nanoha and its sequels, Mahou Shoujo Lyrical Nanoha A's and Mahou Shoujo Lyrical Nanoha StrikerS.
Her magical girl outfit has the color scheme of the RX-78-2 Gundam from Mobile Suit Gundam. This, and her propensity for huge pink lasers of doom, led fans to call her the White Devil.
Her Intelligent Device is known as Raising Heart.
She is voiced by Tamura Yukari.