Height: 212 cm Weight: 130 kg True Identity: Alexander the Great/Iskandar, King of Conquerors Master: Waver Velvet Catalyst: Mantle once worn by Iskandar himself Holy Grail War No.: 4th Holy Grail War

Rider was originally meant to be summoned by Lord Kayneth El-Melloi Archibald, but due to some circumstances, he ended up being Waver Velvet's servant.

Iskandar, or how he refers to himself, the King of Conquerors is a noble and courageous man, who prefers to conquer his enemies by winning without killing and controlling without humiliating them. He is known as a marvelous ruler who once almost conquered the whole known world.

He is not pragmatic, but is a person who lets history run its course and acts according to his impulses. While he is wild and somewhat inconsiderate to others, his greed ultimately resulted in the happiness of the people he ruled over.

In the new era, Rider is mostly amazed by ordinary modern things, and usually spends his free time exploring modern war vehicles and machinery.