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 say he is the most exceptional "Master of Heroic Spirits."

A Demi-Servant fused with Galahad, a Heroic Spirit of the Knights of the Round Table. She has a pure and serious personality but can be a bit airheaded. She is a kind girl who cares deeply for others. While she may seem quiet at first glance, she also possesses a curious and active side beneath her reserved exterior. She is generally polite to everyone, but due to a lack of communication experience, her choice of words is very direct (sometimes unintentionally blunt). Anti-Evil Noble Phantasm: Lord Chaldeas / Lord Camelot. An ultimate defense using the Round Table where the knights sat in the center of the white castle Camelot as a shield. 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.