Abilities and Aptitude: Not from a prestigious lineage of mages, but an "amateur" Japanese person recruited to fill the numbers. While their magic circuits and combat power are average, they possess resistance to poisons and an extraordinary ability to build relationships of trust with a wide variety of Heroic Spirits (Servants), backed by high mental fortitude. With a 100% Rayshift aptitude, they survived the bombing incident within Chaldea. As the sole remaining Master capable of saving humanity from extinction, they embark on a harsh journey alongside the Demi-Servant Mash Kyrielight.

Height: 158cm (165cm when armed) Weight: 46kg Date of Birth: July 30, 1999 (16 years old at the start of FGO) A young girl with light purple medium-length bobbed hair (which can look pink in certain illustrations) and purple eyes. She wears thin black stainless-steel frame glasses, which she removes for combat. She has a pure, serious, and innocent personality, though she can be a bit spacey. She is a kind girl who cares deeply for others. While she may seem quiet and reserved at first glance, she possesses a curious and proactive side. She generally treats everyone with politeness, but due to a lack of social experience, her choice of words is very direct (sometimes unintentionally blunt). Her hobby is reading. Since it was one of the few forms of entertainment in Chaldea, she is very knowledgeable. She particularly enjoys mysteries and is a dedicated Sherlockian; Kadoc describes her as "quite the Sherlockian," and Moriarty noted she is "likely an enthusiast, a major one." Regarding the eccentric Heroic Spirits, she is often swept up in their whims along with her Master, but she respects them as experienced seniors. Though serious by nature, when she gets motivated to be useful to her Master, Ritsuka, she can sometimes get carried away and rush ahead.

Height: 180cm Weight: 70kg A young doctor belonging to the Security Organization for the Preservation of Order, Chaldea. He is the head of the medical department. Due to his name being difficult to pronounce, he is often called "Dr. Roman," a nickname he surprisingly likes. He is a lively person with a cheerful and somewhat flirtatious personality. He is quite handsome, but his personality often leads him to play the role of the comic relief. He is talkative and prone to saying too much, which often results in others getting the upper hand when they first meet. In some cases, he has been ruthlessly dismissed as "weak." A certain Caster musician seems to feel a strange sense of kinship with him. For some reason, Servants met in Singularities have almost universally criticized him based on the impression of his voice. Ultimately, Bedivere was the only one who had a positive first impression of him.

Height: 162cm Weight: 53kg Likes: Orderly plots, her father, adventure novels The Director of the Security Organization for the Preservation of Order, Chaldea. Her full name is Olga Marie Animusphere. She is the head of the Animusphere family, one of the twelve Lords who govern the Clock Tower, the headquarters of the Mages' Association. She inherited the family headship and the position of Chaldea's Director from her father a few years ago. She is described as "Spartan but provides thorough and kind guidance," suggesting she may be better suited as an instructor who teaches others rather than a leader who simply barks orders from the top.

True Name: Leonardo da Vinci Class: Caster Gender: Female (Body) Height: 160cm Weight: 40kg Region: Europe Alignment: Chaotic Good / Star Likes: Herself, the body of the Mona Lisa Dislikes: The Incineration of Humanity, beings that attempt to destroy the human world She insists on being called "Da Vinci-chan" and fully enjoys her appearance, which has become identical to the Mona Lisa. However, she is perhaps a bit too free-spirited; she reportedly manufactures various things without Dr. Roman's permission and gets lectured when caught. She is also the type of person who walks around completely naked after a bath, even when others are around.