Mahou Shoujo Lyrical Nanoha

Nanoha Takamachi is an ordinary elementary school girl until a telepathic cry leads her to an injured ferret. The animal is actually Yuuno Scrya, a young mage from another world, and he is searching for 21 dangerous Jewel Seeds accidentally scattered across Earth. When one of them awakens nearby, Nanoha takes up the intelligent device Raising Heart and discovers that she possesses remarkable magical power.

Collecting the Seeds soon brings her into conflict with Fate Testarossa, a quiet girl her own age who is gathering them for reasons she refuses to explain. Nanoha senses pain behind Fate's cold determination and wants to understand her rather than simply defeat her. Their battles draw the attention of the Time-Space Administration Bureau and expose a tragedy surrounding Fate's mother, turning Nanoha's first steps into magic into a fight to reach someone who has never learned how to ask for help.