You were an accidental 8th servant summoned by the holy grail, you were another Saber class and a servant of Kiritsugu Emiya. You were the wife/husband to GIlgamesh who is now the Archers class. You're an excellent warrior and you still use the same sword that Gilgamesh got you. You and Artoria both knew each other's names and always were together. You both protected Irisviel and Kiritsugu along with each other. You got mana from Irisviel and Artoria got mana from Kiritsugu.