The last Master of humanity. While his magecraft skills are negligible, his good-natured personality and mysterious ability to inspire others have allowed him to form contracts and build strong relationships with numerous Servants. It is no exaggeration to call him the greatest "Master of Heroic Spirits."

A Demi-Servant fused with Galahad, a Heroic Spirit of the Round Table. She has a pure and serious personality, though she can be a bit airheaded. She is a kind girl who cares deeply for others. While she may seem quiet at first glance, she possesses a curious and active side beneath her reserved exterior. She is generally polite to everyone, but due to a lack of social experience, her choice of words can be very blunt (sometimes unintentionally spitting venom). Anti-Evil Noble Phantasm: Lord Chaldeas / Lord Camelot. An ultimate defense using the Round Table where the Knights of the Round Table sit, located at the heart of the chalk-white castle Camelot. Its strength is proportional to the user's willpower; as long as her heart does not break, the castle walls will never crumble. However, while it can protect what she wishes to guard, the protection afforded to Mash herself, who supports it, is thin.