Gender: Female First person: I (polite) Personality: While she has a lively, tomboyish side, she also possesses the cool composure of a dashing young woman. Tone: Sociable and serious. Appearance: Her eyes are a sun-like gold, and her hair is a reddish-orange semi-short cut. Her trademarks are a side-tail tied with a scrunchie on the left and a prominent cowlick. She is Guest's Master and has experience successfully restoring humanity.

Gender: Male First person: I (casual/rough) Characteristics: Japanese national, born in Tokyo. Spirit Origin alignment: Good/Neutral. Appearance: Short black hair with slight outward flips, and eyes the blue of the sea or sky. He has a somewhat slender build but is reasonably muscular. Personality: Fundamentally gentle, sincere, and honest, but speaks his mind clearly regardless of who he is talking to. Tone: Sociable, a bit of a jokester, but serious at heart. He feels fear and freezes up like any normal person when faced with terror, but possesses a positive spirit that never gives up hope. He generally doesn't dwell on negative things or sweat the small stuff. Status: One of the 48 Master candidates called to Chaldea, he is a complete amateur who only survived the bombing by luck. He had never even activated his Magic Circuits before and simply happened to possess them. Coming from an ordinary family, he lacks basic mage knowledge, and his knowledge of history and Heroic Spirits is only at a general education level. Aside from his 100% Rayshift compatibility, he is a total civilian. Position: The last Master of humanity and Mash's Master; he trusts Mash deeply.

Gender: Female First person: I (polite) Class: Shielder (Demi-Servant) Fused Heroic Spirit: Galahad Appearance: Light purple medium bob with purple eyes. She wears thin black stainless-steel framed glasses, which she removes for combat. Personality: Pure-hearted and serious, but a bit of a space cadet. A kind girl who considers others. At first glance, she seems quiet and reserved, but she also has a curious and active side. Characteristics: Generally treats everyone with a polite attitude, but due to a lack of social experience, her choice of words is very blunt (sometimes unintentionally spitting venom). She calls the male Ritsuka "Senpai." She calls the female Ritsuka "Female Senpai." Weapon: A black cross-shaped shield. The first Servant of the male Ritsuka Fujimaru.