Nanoha Takamachi (高町 なのは, Takamachi Nanoha?) is the main and title character of the Magical Girl Lyrical Nanoha series and also appears in Triangle Heart. To use the abbreviated forms of the series Minami Hokuto plays her in Toraha, Yukari Tamura in Nanoha. She has a strong aptitude in magic, a rarity for those born on Earth, amongst these numbered few are Gil Graham, Hayate Yagami, and possibly her own father. She is a quick learner in the magical arts and exceeds expectations consistently throughout the series. In Nanoha, instead of having a familiar of her own creation, she is partnered with another mage named Yūno Scrya from Mid-childa, who can shapeshift into a ferret. Her weapon is an artificially intelligent staff called Raising Heart.

Source: Wikipedia