Servant

Servants (サーヴァント) are Heroic Spirits summoned by the Holy Grail for the purpose of competing under Masters in the Holy Grail War.

Nature
Servants are Heroic Spirits made into special familiars of the highest rank that are bound to the Master. Pure Heroic Spirits, the "main body" in the Throne of Heroes, can only be summoned by the World, and summoning even one is considered to be a miraculous occurrence. Differing from the normal definition of familiars that can be likened to minor mascots unable to be stronger than their masters, Heroic Spirits are the most powerful of beings with which even the five magicians would never be able forge a contact. Rather than it being a hard process to summon them or the fact that they far surpass magi, it is their intrinsic nature in that they are beings beyond magecraft. Magi can perform rituals to borrow their power to mimic them, but cannot summon actual Heroic Spirits themselves.

Even the Holy Grail lacks the power to summon a true Heroic Spirit, so the process is facilitated by summoning them into one of seven vessels prepared beforehand. The Greater Grail makes a copy using information from the "main body" of the Heroic Spirit, an "emanation", that returns to them as information, in the form of a soul, upon the death of the Servant. Disconnected from the "main body", they are able to know of the actions of the Servant through records, as if reading a book. Due to this, any Heroic Spirit summoned in multiple Holy Grail Wars will lack knowledge of previous summonings. The only exemption is King Arthur due to her unique circumstances.

Similarly as to how demons require a form invented by humans in order to take shape, Heroic Spirits need a form to exist in the world. The vessels, classes, act as their temporary name and method of existing. Acting like a "passport to the present", the vessel prepares them for their role as a familiar in advance, allows them to take on that role to help them take form, and brings them forth into the world. Only heroes matching the attributes of the classes are brought forth, allowing them to be summoned into any reflecting their abilities.

Although too powerful to be controlled by humans, hey are bound by three Command Spells, representing the Masters' "right to rule" over them, with obedience towards the Command Spells being the "absolute condition required for materialization." Due to the prospect of having a wish granted by the Holy Grail, it also serves as incentive cooperate with the Master, as well as requiring them for energy upkeep and acting as their anchor to the world. Killing them will normally go against their purpose, but the Command Spells protect the Master from those who would kill them to seek out one who would be more suitable.

The Servant system was designed to summon only the souls of "true" heroes - benevolent, honorable, and selfless protectors of humanity and justice. Due to the corruption of the Holy Grail in the third Holy Grail War, evil spirits can be summoned. These entities can still be considered to be Heroic Spirits if they were widely worshipped, respected, or feared in life.

Within the Fuyuki system, summoning full Divine Spirits is beyond its ability, and it is said the capability to reproduce phenomenon of that level would render the Holy Grail unnecessary in the first place. Only through losing his Divinity did Chiron become an existence able to be summoned, and Medusa, more of a Divine Spirit than a Heroic Spirit, became applicable only after her Divinity decreased through becoming a monster. The Einzberns were confident in their ability to circumvent their own system to bring about the god Angra Mainyu, but he was a Heroic Spirit instead. Within the Moon Cell, the recorded Divine Spirits are considered to be non-human Heroic Spirits and Servants. Though none are summoned, BB creates the Alter Egos, her own customized beings called High-Servants (ハイ・サーヴァント), by combining several of the "goddesses series" of Servants into each.

Characteristics
Servants are beings able to switch between a Spiritual Body and Material Body at will. While in spiritual form, they cannot be easily detected by enemies, due to being invisible to the naked eye and most forms of scrying, or affected by physical interference. They can travel where they please without being impeded by walls, but they also cannot carry anything in that state. Their senses are limited to spiritual sensations, so they must materialize in order to fully experience normal senses when sharing a visual link with their Master. Their upkeep cost is low when not materialized, so many Masters prefer them to stay in spirit form to lower the cost on themselves. Depending on the disposition of the Servant or a special case like Saber, such an order may be impossible. It is also hard for them to affect a Material Body in that state, so they must materialize to properly engage in combat.

Even when having enough energy to stay materialized, Servants must have an anchor to the world, their Master or another physical being. Depending on the amount of energy or level of Independent Action, they may be able to only stay materialized for a few hours or a few days before fading. They cannot form proper contracts with other Servants, as spirits cannot link spirits to the world. Caster is able to summon Assassin, but it is an improper summoning with several complications. Rather than her being his anchor, it is the mountain gate, so he cannot leave the area. Without a Master, they are no different than regular spirits and may be affected by the Church's scripture.

While they may bleed and take damage to their organs, their true being resides in a Spiritual Core they obtain upon first materializing. Their Material Body envelopes it, and damage must be inflicted to it in order for them to be defeated. It gradually diminishes under magical energy expenditure and while sustaining bodily damage, and their expenditure will escalate under such conditions. If it is damaged through powerful magical energy, curses, or Noble Phantasms, it will be destroyed, meaning that the Servant can no longer stay materialized. The heart and head are directly connected to it, so they are a Servant's greatest weaknesses. Sustaining damage will significantly weaken it, with some Servants having it instantly destroyed and some with skills like Battle Continuation being able to at least temporarily sustain themselves.

While they have Material Bodies like humans, the composition is drastically different. They are of a much higher magnitude, so it is normally impossible for portions to be transplanted onto a human. Shirou Emiya is able to obtain Archer's arm due to them being the same person. Normally the recipient would die of shock, but being even closer than twins allows the surgery to succeed. It is still too much for him even in that case, so being connected to it slowly kills him. Sieg, a homunculus, obtains Siegfried's heart, gaining the ability to transform and a longer lifespan.

It is possible for a Servant to possess a human, such as with Ruler and Avenger. Avenger creates a replication of a real person in the world of the Holy Grail and then takes over the body due to lacking a normal form. Ruler is given a body by the Grail due to the previous Ruler still existing and corrupting the process of materializing her. It searches for a match with a compatible physical build, spiritual build, personality, and magical energy. The possession seals the target's former personality and spiritually installs the Heroic Spirit. After receiving clearance from the host personality, it performs a "cross-domain base anatomy backup" to be able to restore the target even if Ruler is killed. It adapts the physical and spiritual build, grants the Class Skills, grants knowledge of Heroic Spirits and the modern era, and inputs other required data. Overwriting and merging with the target's body and personality, Ruler notes having most of the target's memories. Rather than two personalities in one body, it is more that they merged into one.

As Human Spirits, they have the ability to consume the souls and minds of people and convert them into energy. Their basic abilities do not change from such nourishment, but they become tougher as their magical energy capacity increases.

Summoning
There are several factors that determine which Heroic Spirit the Master will summon. Performing a summoning ritual (儀式の召喚) to interfere with the Greater Grail causes it to borrow the information of the main body of the Greater Grail in the Throne of Heroes. The information, the soul of highest purity of the Heroic Spirit, is taken into the container of the Class and becomes a created "copy", so to speak, of the Heroic Spirit, a Servant. Within the Fuyuki Holy Grail War system, there is a rule making only the summoning of Western Heroic Spirits possible due to the Holy Grail being a Western, Christian, concept and that the summoning system was created in the world of Western magi. Sasaki Kojiro of the Fifth Holy Grail War is a complete aberration in many ways. Other systems like the Moon Cell Holy Grail War have no such restrictions.

It is possible for the Grail to simply select a Servant for the Master by choosing a Heroic Spirit with good affinity with them, but they can also designate the Heroic Spirit during the summoning ritual by preparing a catalyst with ties to the Servant that they desire. If they choose a catalyst for multiple Heroic Spirits like the, the symbol of the , the Heroic Spirit among the candidates that has good affinity with the Master will be chosen. The magus must choose whether to go for good compatibility, possibly loosing the gamble with a poor Servant, or to draw a specific Servant of their choice with a catalyst and possibly be ruined by bad compatibility.

While the rituals are generally specific, their main goal is to act as a precaution to create a bond with a perfect, reliable Servant. They really only require a summoning circle, even if unskilled, and a catalyst can bypass the need of chanting a spell. Doing so can create aberrations like Gilles de Rais being placed into a normally unsuitable class or King Arthur having a bad connection with her Master that does not allow her to receive prana through normal methods. The Grail of Fuyuki requires seven Servants, so it will pick from anyone appropriate until it has all seven in cases where more capable magi have not summoned Servants already.

Examples of catalysts include:
 * King Arthur: Avalon, the sheath of Excalibur.
 * Heracles: The Axe-sword, a slab of rock from a temple of Heracles.
 * EMIYA: Rin's Pendant
 * Medusa: Mirror dug up from a temple in Eritrea, an item with ties to an old Earth goddess of Greece.
 * Medea: Literature from Colchis with ties to Medea.
 * Sasaki Kojirou : The mountain gate.
 * Hassan-i-Sabbah: Since Hassan is the origin of the word Assassin, the class of Assassin itself is Hassan's catalyst.
 * Cú Chulainn: Jewel on which is engraved an original rune inscribed by Cu Chulainn that had been crafted into earrings.
 * Alexander the Great: Shard of cloth from his mantle.
 * Gilgamesh: The first snake's Shed Skin, and the key to the Gate of Babylon.
 * Siegfried: Bloodstained leaf of a Sacred Fig tree.
 * Astolfo - Glass bottle which had a liquid stain left on it.
 * Chiron - Ancient arrow blackened by blood.
 * Frankenstein - The blueprints of the 'Ideal Human.'
 * Remnant of the : Heracles,, Medea, , or other crew members
 * Splinter of the - King Arthur, Lancelot,, Gawain, , , Mordred, or other members of the Round Table.

When summoned, Servants are imparted with knowledge of technology, culture, science, language, and terms of the era they were summoned into in order to most properly work with their Masters and blend into society. Rider displays the ability to speak English to his Master, Waver Velvet, and also speak Japanese to Taiga Fujimura, allowing him to easily translate between the two. This is largely to prevent Servants from periods significantly before the era of a Grail War in question from suffering crippling culture shock which would otherwise prevent them from fulfilling their duties, and also enable them to blend in with that era's society. It is not all-encompassing, so concepts may have to still be explained to them. Saber does not understand the idea of dating until it is framed into the similar method of courting of her time, and Rider enjoys spending his time learning about different aspects of the world.

Without such knowledge, a Servant's potential would be crippled. This knowledge does not just cover history but all aspects of "modern" life during the Grail War in question, to the point that Servants can find things that would have been unthinkable in their lifetimes to be mundane or even worthy of scorn. They are not granted knowledge on other Heroes through the Grail, but rather from knowledge gained within the Throne of Heroes. Witnessing traits of other Servants can allow them to deduce their true names with the knowledge even if they are from incompatible eras. Aberrations like Saber, who is not part of the Throne of Heroes due to her circumstances, are able to identify those whose legends would have been known to them in life, such as Cú Chulainn, but cannot identify the legends of later Heroic Spirits like Gilles de Rais even after being directly named.

Irisviel von Einzbern figured that Saber would be surprised and excited upon flying in a plane, but she finds it rather mundane instead after receiving knowledge of it and the possible ability to fly one with her Riding. While not given enough information to actually drive vehicles, her ability is able to manage such through intuition even if she does not actually recognize what each separate control of a vehicle will actually perform what action. Rider does note surprise at the knowledge of the true state of the world being a sphere, and he has enough familiarity to use modern appliances and money, order a specialty t-shirt through the postal service, and buy and play a video games console.

All Servants have an (属性), a status showing a clear representation of the mentality of the Servant, differing from the elemental alignment of magi. It is broken down into two parts, a combination of the principles they consider important and their personality. Principles are reflected as Chaotic (混沌／渾沌), Lawful (秩序), and Neutral (中立), and their personalities are reflected as Good (善), Evil (悪), and Neutral (中庸). Berserker Servants have also displayed Berserk (狂化) as a "principle", and Mad (狂) and Wild (暴走) as their "personalities." Differences in personality will not result in major discord, but differing principles can make Servants resolving their differences of opinions difficult. While two Servants may have the same personalities as "good", like King Arthur and Gilgamesh, their Lawful and Chaotic principles lead to differing opinions. Masters can read the alignment of Servants along with other data.

Strength
The strength of the summoned Servants depends on various factors. It is ideal if the Servant can wield their original power as a Heroic Spirit, but it is also possible that they can even surpass their original selves in the case of the Mad Enhancement of the Berserker class. It is also possible to obtain Class Skills they did not originally have in life or have their own attributes strengthened by their classes' natural attributes.


 * Cultural Sphere (文化圏) - The Land (土地) in which the Servant is summoned and the Recognition they receive there are two factors that play a role in their strength. The closer the are to the stage of their legend, a geographical boost, and the more that they are known makes them "stronger", bringing them closer to the strength they had in their legend and providing them with more of their equipment displayed in their legend. Depending on the circumstances, it is possible it can bless them with additional Noble Phantasms. The boost from recognition alone is not that large in making a difference in power as when Rin Tohsaka is speculating on Gilgamesh's ability to overwhelm other Servants. Land plays a greater factor with Cú Chulainn, Heracles, and King Arthur being three heroes around the same level of strength when summoned in Europe. Each would be strengthened in Europe and benefit most greatly in battle in their home country, though Heracles' fame would allow him to display excellent power throughout all of western Europe. Cú Chulainn, gaining zero influence from not being known as well in Japan, does not fully display his "shining existence" on par with them while in Fuyuki, but would anywhere else in the world. He would obtain several benefits from being summoned in his homeland, Ireland, and outfight Diarmuid Ua Duibhne, who would have an advantage when both are unaffected by the cultural sphere and have other factors at play. Vlad III gains a great boost in Romania, placing him on the same level as those famed heroes, and Semiramis gains her maximum fame while in the confines of the Hanging Gardens of Babylon.
 * Magic energy of the Master - The more powerful the magical energy of the Master, the greater the Servant will be able to reach the strength they displayed in their legend. If they cannot provide proper energy or if the Servant lacks a Master for a time, their parameters lower in proportion. If it is a lack of energy, unknown factors will lower parameters and skills with some Servants, while the Master's way of life may affect others. King Arthur, serving under several different Masters, displays a number of different sets of parameters due to fluctuating levels of energy. Under Shirou Emiya, she receives no energy because his Magical Paths are obstructed and cannot display her full strength. Kiritsugu Emiya is able to supply energy to have her be stronger than under Shirou, but her luck is affected by his personality due to still not providing enough energy. Her Riding is increased one rank higher than normal for an unknown reason. Rin Tohsaka is a excellent magus able to allow her to unleash her full abilities without being affected. Two Servants who would be balanced differently under other circumstances may find the balance tipped when one has better Master support.
 * Container Parameters: Unmodified by the strengths and weaknesses of specific Heroic Spirits, the containers of the seven standard Servant classes of the Fuyuki Grail War possess known base parameters. Heroic Spirits may affected depending on which classes are suitable for them, and statistics may be lower than the base statistics. For Vlad III, it is mentioned that the specifications of the Rider class would be too low for the fame boost he receives in Romania, so the Lancer class is most suitable for him to display his power.

Battle
Battles between Servants can be called a process of gradually shaving off the magical energy that forms their bodies. Attacks that consume a great amount of magical energy will inflict a massive amount of damage on the opponent, but it will also weaken the attacker in the process. In order to inflict a great amount of damage with minimum expenditure of magical energy, it is necessary for them to collect intelligence regarding the enemy and assault their weakness. The greatest weapon is their Noble Phantasm, and a battle between Servants can often be called a battle between Noble Phantasms.

The true name of a Servant is something vital to battle, as it can reveal much about them. It can reveal certain traits about their abilities, allowing for specific countermeasures, and there are many famous heroes that had met untimely deaths in life. Those killed by poison will be more susceptible to it, those shot down by arrows will be weak against them, and those with weak spots will be severely disadvantaged. There are also things like the traits of a dragon being weak against dragon-slaying weapons, and even without such a specific countermeasure, releasing that information to the other Masters can allow for other countermeasures.

Famous heroes like King Arthur and Siegfried are very likely to have their identities found out more easily than others. Simply glancing upon Excalibur is enough for any Heroic Spirit to know her name, while someone like Gilgamesh is able to show off his Noble Phantasms without many being able to guess. Others need to utilize their Noble Phantasms before they reveal themselves, but it may require deductive reasoning even then. There are those without specific weaknesses whose true names will bring no trouble if revealed like Astolfo.

Their strength can be likened to the attack power of one "fighter", too overpowering for a single person to stand against. It would still take them many times to refuel in order to destroy a city. Their main strength is their inability to be harmed by regular weapons, meaning that even though there are numerous destructive modern weapons, Servants are among the most powerful. Just as a fighter can load a nuclear warhead, each Servant has the own Noble Phantams, and the ones with ridiculously powerful ones are the main reason for likening them to a fighter.

Beings other than Servant able to combat Servants are few in modern times. Matched up against Servants with extremely average Noble Phantasms, those of B rank with the ability being represented by numbers, Arcueid Brunestud would always generally win against a single Servant due to her overwhelming strength, but would likely fall if two were to fight her at once. The members of the Twenty Seven Dead Apostle Ancestors, Kouma Kishima, and Aoko Aozaki can fight directly, while Ciel and the Shiki Ryougi's third personality can keep up in a defensive fight that can still be called a fight. Ryougi's normal personality and Shiki Tohno have no chance of matching Servants. Humans utilizing ten Command Spells would also be able to damage Servants.

Against Dead Apostle Ancestors, both are types of beings that live in mystery, so such battles would come down to "having the means of killing the other guy somehow." Servants will generally hold a slight advantage, barring compatibility issues, and the Knight classes, Saber, Archer, and Lancer will all be able to have solid fights. While Saber's Excalibur is extremely effective against those who overwhelm by material quantity and alienness, there are those capable of surviving being hit by Excalibur-class attacks through pure endurance. At the same time, those same ones with extreme endurance would have a tough time with Lancer's Gae Bolg. ORT, to which Earth's rules don't apply, and Primate Murder can be called in a league of their own above both Ancestors and Servants.

They completely overwhelm normal humans. Even trying to apply pressure to a Servant the size of a child feels like trying to bend a steel beam to a normal human, and a punch with all of their strength does not even budge them a millimeter. Stabbing them with a knife does nothing but bring about a "prickling irritation" that does not hurt at all. Even Souichirou Kuzuki, whose punch can break a skull, can only slightly move Archer's head from the impact.

Classification
Heroic Spirits summoned by the Holy Grail are place into one of seven classes. The seven standard classes are Saber, Lancer, Archer, Rider, Caster, Assassin, and Berserker. According to Rin, servant classes are changed between each war, so other classes, such as Avenger created by the Einzberns in the Third Holy Grail War, can also be summoned. The Three Knight classes are the only Servants who will definitely be summoned according to the framework of the Holy Grail War, allowing for variation in the rest of the classes. More than one version of the same class cannot be summoned, even if all the Masters were to use the variation in the summoning chant to get a Berserker-class Servant.
 * Saber: Servants placed within this class are agile and powerful melee warriors. It is commonly assumed to be the best class overall, with high ratings in all categories. It is one of the three Knight classes, together with Lancer and Archer and also possesses the Riding skill like the Rider class.
 * Lancer: Servants placed within this class are very agile and skilled with long-range melee weapons, such as spears, lances, etc. It is one of the three Knight classes, together with Archer and Saber.
 * Archer: Servants placed within this class are usually proficient with projectiles and can survive longer without a Master nearby, thanks to their special ability Independent Action; the strongest Archers can be difficult to control at times, in fact, due to their near-total independence from their "Masters". It is one of the three Knight classes, together with Lancer and Saber.
 * Rider: Servants placed within this class place emphasis upon speed and powerful Noble Phantasms, which often include their mounts. Their special skill is Riding, which allows them to fully utilize abilities of their mounts (which can range from simple horses to mechanical vehicles to divine or supernatural creatures.).
 * Caster: Servants placed within this class are adept in magecraft and have a special ability akin to Reality Marble, called Territory Creation, which alters or creates space around them to enhance their sorcery.
 * Assassin: Within the Fuyuki Holy Grail War, Servants placed within this class are always, as a rule, one of the 19 Hassan i Sabbah, the leaders of the clan of the Hashshashins who passed their name down. The Assassin in Fate/stay night summoned by Caster is an exception, an aberration in the system, as he was summoned by another Servant. This rule comes from how the word "assassin" itself finds its etymological roots in that clan. This rule is not present in the Moon Cell Holy Grail War and Great Holy Grail War, allowing for those known to be specialized killers to be summoned. The Assassins' special ability is Presence Concealment, which allows them to remain undetected. Offset by their stealth is their weak combat skills. Due to this, Assassins often target Masters instead of Servants.
 * Berserker: Servants placed within this class are always heroes who have gone berserk in their lifetime. This trait allows them to use the special ability Mad Enhancement, which trades their consciousness (i.e. sanity) for a large power boost. Most Masters are incapable of controlling their Servant once Mad Enhancement has been activated, which eventually results in their death.
 * Avenger: It is not one of the seven normal classes, and it has only been used once as a unique container for Angra Mainyu in the Third Holy Grail War.
 * Saver: This is an irregular class in the Holy Grail War of the Moon Cell in Fate/Extra. The only case is of the class is Saver.  Saver is a "messiah" type Servant, and was carefully selected by the Automaton from the collective records of the Holy Grail War.
 * Ruler: Servants placed in this class govern the rituals utilizing the Fuyuki Holy Grail War's Greater Grail while its reserve system is in effect, such as Joan of Arc in Fate/Apocrypha. Ruler is a special Heroic Spirit summoned by the Holy Grail itself to act as the administrator of the Holy Grail War and has the ability to use Command Spells, which are normally only usable by Masters, to command the Servants.
 * Beast: This class is a special container for the 666th Beast in Fate/Prototype.
 * Funny Vamp: Funny Vamp (ファニーヴァンプ) is the class granted to Arcueid Brunestud by the Moon Cell should she participate as a Servant. While she takes on the Berserker class instead, Funny Vamp reflects her whimsical nature and her status as a creature that drains blood, physical energy and money from men.
 * Alter Ego: This classification is for those created by BB as High-Servants made of several goddesses.
 * Launcher: Launcher, "the Heroic Spirit of the laser beam", is a special nickname thought up by Jinako Carigiri for her Servant.
 * Gilgamesh: Gilgamesh during Fate/Extra CCC is beyond being confined to a class, so he does not have one.
 * Monster (モンスター): Monster is not a Servant classification, but rather the title given to the irregular being, Shiki Ryougi, who appears within the Holy Grail War of the Moon Cell.
 * Others: The class Gunner (ガンナー) is suggested as a possibility by Archer. Lancer declares herself to be Idol (アイドル) and nicknames Gilgamesh Gorgeous (ゴージャス). Butler (バトラー) is also used in a joking manner.

Fuyuki Holy Grail War
The events of the Fuyuki Holy Grail Wars are detailed in several stories. Some details of the Third Grail War are mentioned in Fate/hollow ataraxia. The events of the Fourth Grail War are described in Fate/Zero. The events of the Fifth Grail War are detailed in Fate/stay night and Fate/hollow ataraxia.

Moon Cell Holy Grail War
The events of the Moon Cell Holy Grail War are detailed in Fate/Extra and Fate/Extra CCC.

Great Holy Grail War
The events of the Great Holy Grail War are detailed in Fate/Apocrypha.

Servants for the canceled game Fate/Apocrypha project.

Tokyo Holy Grail War
The events of the Tokyo Holy Grail Wars are detailed in Fate/Prototype and Fate/Prototype: Fragments of Blue and Silver.

False Holy Grail War
The events of False Holy Grail War are detailed in Fate/strange fake. The Saber class is absent and replaced by the Player.

Imperial Holy Grail Strange Saga
The "events" of Imperial Holy Grail Strange Saga are detailed in Koha-Ace.

Others

 * , and  are jokingly mentioned in the Fate/Prototype Drama CD as being summoned by Ayaka Sajyou to use their powers of persuasion to end the Second Holy Grail War without any casualties.
 * Armstrong (アームストロング) is a Servant mentioned by Shinji Matou to be a participant in the Moon Cell Holy Grail War, possibly referring to.
 * Bucephalus, Mithrenes, and the soldiers of Ionioi Hetairoi are all temporary Servants summoned and sustained by the Reality Marble.
 * Dragon Rider (ドラゴンライダーで) - The development stage of Fate/Zero was to feature a Rider who rode a dragon and had a climactic battle with Saber that ended with her using Excalibur, but Nasu could not think of one who rode a minor dragon. Alexander the Great was originally to be an unspecified, abnormal-class Servant, but Gen Urobuchi wished for him to be Rider instead and ultimately replaced the idea. Caster and his Gigantic Horror were later used to fill the place of facing Excalibur.
 * (清姫) is a Servant in the Moon Cell. It is unknown if she participates in the Moon Cell Holy Grail War, but she is mentioned by Caster as an e-mail friend. She says that Kiyohime's method of dealing with love rivals would be to "trap them in a bell and then set it on fire."
 * (始皇帝), the First Emperor of the Qin dynasty, is noted as the most celebrated figure in Chinese history. One of his Noble Phantasms has been recovered in modern times, and it is useable as a weapon even by normal magi. The Kuruoka family believes that he will be a Heroic Spirit that requires deference even from the summoner. He is never summoned due to their daughter obtaining Command Spells and her own Servant.
 * Scathach,, the , , and are potential Servants that can be summoned by the Player.
 * , the Great Sage Equalling Heaven (斉天大聖), briefly appears in Koha-Ace when thought of by Kohaku in the lead-up to the reveal of Sakura Saber, but is quickly discarded after two pages as part of a gag. She is imagined as a woman, and it is unknown if she will appear again.
 * was to be the Rider-class Servant of Old Fate, but was replaced by Perseus for Fate/Prototype.
 * Stray Servant - Originally to be a "Servant of the Shield" to rival Saber during Fate/stay night, she is a Servant with an unknown identity cut during development.
 * - Urobuchi considered using one of the Chinese Xian when attempting to think of the Caster-class Servant for the Fourth Holy Grail War that eventually ended up being Gilles de Rais. Nasu explained the Western-only rule of the Fuyuki system, and felt that the Xian would be too strong.

Servant Parameter listing
Parameters for each Servant