Ruler

, , is a non-standard Servant Class brought forth for the purpose of presiding over Holy Grail Wars. The Fuyuki Grail utilizes its own logic to sense when actions are encroaching upon its authority, and regardless of other mediators like those from the Church, it brings forth Ruler to protect the concept of the Holy Grail War itself. In the case of the reserve system of the Greater Grail being activated in the Great Holy Grail War, Ruler takes neither side of the battle, but only acts in the interest of the Grail. The Ruler-class Servants are given Command Spells for the other Servants.
A Ruler is also summoned to preserve the laws of Heroic Spirits to ensure they won't be violated, such as the law of "the dead not leading the living", touted as the greatest law of Heroic Spirits,Fate/Apocrypha Volume 3: Triumphal Return of the Saint - Chapter 4
Fate/Apocrypha Manga - Chapter 47: "Maria the Ripper"Fate/Apocrypha Anime - Episode 13: "The Last Master" and to maintain human history by preserving the illusion behind the Age of Gods so that people do not know about the truth behind it. The role of a Ruler is to arbitrate the truth and adjudicate all things in order to maintain human history.Fate/Grand Order - Sherlock Holmes' Trial Quest summary, translated by taiboo at Reddit.
The criteria to be summoned for the Ruler Class is impartiality and possessing no desire for the Holy Grail. Those who qualify are most often Saints, and any Ruler summoned to preside over a Holy Grail will be a Saint under normal conditions.Fate/Apocrypha Volume 2: Round Dance of Black / Festival of Red - Chapter 3 Within other systems like the FATE System, others who meet the criteria can be summoned. One exception to the normal rule of impartiality is Amakusa Shirou Tokisada, an aberration who does not normally qualify, summoned by the Einzberns as the Heroic Spirit who was considered the closest to a ‘Saint’ that could possibly be found in the Far East.
==Known Rulers==
* Servants marked with ‡ are also able to be summoned by Ritsuka Fujimaru in the Grand Orders.
* Servants marked with ⁜ are those who change class mid-story but do not display characteristics substantially different from the original class.
True Name 	War 	Master
Amakusa Shirou Tokisada‡	Third Fuyuki Holy Grail War 	Einzbern Master
Jeanne d'Arc‡ 	Great Holy Grail War 	None
Karl der Große 	Moon Holy Grail War 	None
Astraea 	Grand Order 	Ritsuka Fujimaru
Caren C Hortensia 	Grand Order 	Ritsuka Fujimaru
Himiko 	Grand Order 	Ritsuka Fujimaru
Iyo 	Grand Order 	Ritsuka Fujimaru
Johanna 	Grand Order 	Ritsuka Fujimaru
Qin Shi Huang (Lostbelt)	Grand Order 	Ritsuka Fujimaru
Sherlock Holmes 	Grand Order 	Ritsuka Fujimaru
Uesugi Kenshin 	Grand Order 	Ritsuka Fujimaru
James Moriarty‡ 	Grand Order 	Alien World
Jeanne d'Arc (Alter) 	Grand Order 	None
Mecha Eli-chan MkII⁜ 	Grand Order 	None
Morgan le Fay 	Grand Order 	Beryl Gut
Tezcatlipoca⁜ 	Grand Order 	Daybit Sem Void
Ashoka 	Grand Order 	None
Gilgamesh 	Waxing Moon Ritual 	None
Ibuki-douji 	Waxing Moon Ritual 	None
Plato 	Most Powerful Great Figures Chapter	Yukika Saegusa
==Rulers with modified Saint Graphs==
Servants possessing the Class of Ruler through the modification of their Saint Graph rather than a standard summoning.
Heroic Spirit 	War 	Master
Martha (Swimsuit) 	Grand Order	Ritsuka Fujimaru
(Altera) 	Grand Order	None
(Altera) 	Grand Order	None
Quetzalcoatl (Samba/Santa) 	Grand Order	Ritsuka Fujimaru
Artoria Pendragon (Lancer) (Swimsuit)	Grand Order	Ritsuka Fujimaru
Leonardo da Vinci (Swimsuit) 	Grand Order	Ritsuka Fujimaru
Scáthach-Skadi (Swimsuit) 	Grand Order	Ritsuka Fujimaru
Melusine (Swimsuit) 	Grand Order	Ritsuka Fujimaru
==Non-Servants==
Non-Servant beings with the Saint Graph Designation of Ruler.
*Zeus (Lostbelt)
==Other qualifying heroes==
True Name 	Current Class	Notes
BB 	MoonCancer 	FGO Profile
Robert E. Lee	None 	Fate/Grand Order CHALDEA ACE
Martha 	Rider 	
Qin Shi Huang	None 	https://twitter.com/ryohgo_narita/status/1675453946805260290
==References==
vi:
Category:Servant classes
*
Category:Overseers