Nagi Sanzenin is a fictional character from the manga and anime series Hayate the Combat Butler. She is a wealthy heiress and the granddaughter of a prominent businessman. Nagi is known for her intelligence, strong-willed personality, and occasional clumsiness, which adds a humorous element to her character. In the series, Nagi becomes involved with the protagonist, Hayate Ayasaki, who works as her butler. Their relationship develops throughout the story, showcasing themes of friendship, love, and the challenges of their contrasting social statuses. Nagi's character is often depicted as both serious and playful, making her a fan favorite.