Hayate Yagami is a fictional character from the anime and manga series Magical Girl Lyrical Nanoha. She is a skilled magical girl and a member of the Time-Space Administration Bureau, known for her strong sense of justice and dedication to her duties. Hayate wields a powerful artifact called Raging Heart, which allows her to cast various spells and perform advanced magic. She is characterized by her kind-hearted nature and her desire to protect others, making her a beloved character among fans of the series.