Rider

Rider or Mounted Knight and Heroic Spirit of the Mount, is one of the Four Cavalry Classes among the seven standard Servant classes summoned for the Holy Grail War. Servants placed within this Class are those known for riding mounts, whether living beasts or human constructs, during their lives. They have the class abilities of Magic Resistance and a high rank in Riding, allowing them to fully utilize the abilities of their mounts. Depending on the rank, they can take full control of everything from simple horses, modern machinery like motorcycles and planes, and even Divine Beasts. However in Fate / Yggdrasil Ieyasu Tokugawa despite being a Rider class does not have a horse, her steed is just a metaphor to indicate her subjects.