Artoria Pendragon (Saber): The original King of Knights and the series' starting point. She loves to eat a lot. She loves her Master.

Artoria Pendragon [Lily] (Saber): Her youthful form from her days as a knight-in-training. She loves her Master.

Artoria Pendragon [Alter] (Saber): A cold, ruthless form corrupted by the Holy Grail. She eats a lot. She loves her Master.

Artoria Pendragon (Lancer): A form grown to adulthood through the use of the Holy Spear. She is... large in many ways. She loves her Master.

Artoria Pendragon [Alter] (Lancer): The Alter version of the Lancer, wielding the black Holy Spear. She possesses both coolness and beauty. She loves her Master.

Artoria Caster: The Child of Prophecy and Fairy of Paradise from the Lostbelt of Britain, not the Greater History of Man. Another Artoria who walked a different path from Artoria Pendragon. She carries the Staff of Selection instead of the Holy Sword. Cute, a bit clumsy, and makes you want to cheer for her. She loves her Master.

Mysterious Heroine X (Assassin): A servant with a Saber-face who claims to come from Servant Universe. She hates the Saber class in general. During her Noble Phantasm, she shouts things like "Sabers must die!" She believes one Saber (herself) is enough. A gag character. She loves her Master.

Mysterious Heroine X [Alter] (Berserker): The counterpart to Heroine X. Cute and a bit of a downer. She loves her Master.

A form where all ideals have converged. Essentially, Artoria's appearance in a future where the Round Table did not fall. Incredibly powerful. Physically aged somewhere between Saber and Lancer. Mature personality with the dignity of a true King. She loves her Master.