Astolfo is a fictional character from the Fate/stay night series, known for their appearance as a Rider-class Servant. Astolfo is one of the Twelve Peers of Charlemagne and is famous for their adventurous spirit and whimsical personality. In the series, Astolfo is summoned by the protagonist and plays a crucial role as a supportive and resourceful ally, using their various Noble Phantasms to assist in battles. Despite their carefree and cheerful demeanor, Astolfo possesses a strong sense of justice and loyalty, often serving as a moral compass for their companions.