Alexander, Class Name Rider, is a Rider-class Servant summoned by Ritsuka Fujimaru in the Grand Orders of Fate/Grand Order. Rider is summoned in his form as a child as his time as the young prince of Macedonia in the 4th Century BC. He was known as a "peerless pretty boy" who was noticed by many sages, such as Aristotle, as a prodigy. Rider is an "innocent child who loves the epic poem 'Iliad' from the bottom of his heart." Summoned in this form, both his figure and mentality are that of his youth, but he has not lost his memories of his life. Those from after his adolescence are "somewhat lacking a sense of reality". As he is the "embodiment of the mentality of one who attempts to take his very first steps", he can be said to assist his Master's own steps, but he will not be pleased when he notices that the "demise of human history means nothing but the closing of even his own possibilities."