Question: Who is the main character of Fate/Zero?

Zero characters

List of ''Fate/Zero'' characters
This is a list of characters from the Japanese light novel series, Fate/Zero by Gen Urobuchi, illustrated by Takashi Takeuchi and a collaboration between Type-Moon and fellow developer Nitroplus. It is the direct prequel to the Japanese adult visual novel, Fate/stay night and was adapted into an anime series by Ufotable.
Main characters
Kiritsugu Emiya
Voiced by: Rikiya Koyama(Japanese); Matthew Mercer[1] Marianne Miller (Young Kiritsugu) (English)
Kiritsugu Emiya(衛宮 切嗣,Emiya Kiritsugu) is the master of Saber and the main protagonist. Born in Fuyuki City, Kiritsugu was raised on Alimango Island, where he lived with his father, Norikata Emiya, the fourth family head of the Emiya family and a magus specializing in time magic. He became friends with Norikata's assistant, a local girl called Shirley who was four years older than him, developing a crush on her. However, disaster struck when Shirley became a vampire after drinking one of Noritaka's potions. She pled for Kiritsugu to kill her, but he fled instead. Shirley subsequently lost control and turned all the residents of Alimango Island into vampires.
Their village was soon overrun by Executors from the Church and Enforcers from the Mages' Association, agents whose purpose was to destroy all the vampires and eliminate any trace of civilization and vampirism on the island respectively. Kiritsugu was the only survivor of the 'cleansing', saved by Natalia Kaminski, a freelance Enforcer who wanted information on the magus responsible. Returning to the hidden Emiya residence, Kiritsugu confronted his father on his research and Shirley's death. Realizing that his father had intended for the village to be his testing site for his research on immortality, Kiritsugu shot his father to prevent a similar tragedy from unfolding again in the future. He came under Natalia's wing and assisted her as she hunted down rogue magi. As they continued to eliminate dangerous threats to world peace and stability, Kiritsugu repeatedly eliminated the dangerous minority to save the majority. Eventually, during a mission gone awry, Kiritsugu chose to kill Natalia to prevent a worst-case scenario. It was then that he became disillusioned with the ideal of becoming a 'hero of justice', as he realized it was impossible to save one person without losing another.
Around eleven years before the fourth Holy Grail War, he took on a child soldier he had rescued as his apprentice, who he eventually named Maiya Hisau, training her in much the same way Natalia trained him. Two years later, Kiritsugu was hired by the Einzbern family to be their representative in the coming conflict. Believing that the Holy Grail could grant his wish for world peace, he left behind his former work. Despite being the true Master of the Einzbern family, Kiritsugu operates mostly in the background during the conflict, ambushing other Masters while they are otherwise occupied. Saber partners with Irisviel and acts out in the open to avoid conflict between Kiritsugu and Saber, as their methodologies conflict. Over the course of the War, Kiritsugu's mask of being a heartless assassin begs to crack, as he is torn between withdrawing from the war to live in peace with his family or sacrifice them to realize his wish of world peace. During his final fight with Kirei, Kiritsugu is dragged into the Grail. Grail's true nature (shown to have been corrupted) manifests, showing that it can indeed grant wishes but only via methods that the user already knows. Kiritsugu realizes that the Grail would interpret his wish by killing off every last person on earth except for himself and his family. Steeling himself, Kiritsugu kills the illusions of his family that the Grail shows him and declares that he save the world. Upon returning to reality, he orders Saber to destroy the Grail. However, the Grail is unable to be destroyed and its corrupted nature causes a huge fire. Kiritsugu desperately looks for survivors, discovering an amnesiac boy who he names Shirō and adopts. Kiritsugu then spends months trying to retrieve his daughter Illya, but the Grail's curse robbed him of his magical abilities and physical health while Acht strictly trains Illya to become the next vessel under the impression that her father abandoned her. Years pass as Kiritsugu wastes away from the curse. As his life fades, while watching the moon with his adopted son, Kiritsugu talks about his dream to become a hero and how he hadn't been able to after becoming an adult; he believes that he had been a failure in his life. Shirō, however, ends up taking his father's dream to heart and declares that he will take up Kiritsugu's dream (setting the backstory for the Emiya family in Fate/Stay Night). Kiritsugu realizes that Shirō will not make the same mistakes that he did, and quietly passes away with contentment.
Irisviel von Einzbern
Voiced by: Sayaka Ohara(Japanese); Bridget Hoffman[1] (English)
Irisviel von Einzbern(アイリスフィール・フォン・アインツベルン,Airisufīru fon Aintsuberun) is the main heroine of the story and Kiritsugu's wife. She is a homunculus prototype created by the Einzbern family with the idea of giving birth to an ultimate homunculus.  Like many of the Einzberns, she is skilled in alchemy.  Irisviel serves as Saber's proxy Master, since Kiritsugu believes that he and Saber are incompatible. Due to possessing the inborn knowledge and reasoning of homunculi, hindsights gleaned from the 1000 years of history of the Einzbern as well only having nine years of life-experience, she has both the elegance of a lady and the innocence of a child. Her true purpose in the War is as the vessel of the Holy Grail itself. When four or more Servants are killed, she will manifest as the Grail, losing fully her humanity and sense of self in the process.
Created by Jubstacheit von Einzbern, the eighth head of the Einzbern family, she originally saw herself only as a tool to summon the Holy Grail. Upon first contact with Irisviel in the Einzbern residence in Germany, Kiritsugu noted that she had no instinct for self-preservation and expressed doubts about Irisviel's suitability as the Grail to Jubstacheit. In response, Jubstacheit threw Irisviel into a junkyard for rejected homunculi, a dangerous place filled with monsters and spirits, reasoning that if Irisviel could not even survive a night there alone, he would accept Kiritsugu's criticism and furnish him a new homunculi. In response, Kiritsugu rescued Irisviel and decided to give her a sense of self-preservation by personally educating her and teaching her what it meant to be a human. Eventually, they fell in love with each other. Wanting to show Kiritsugu that there could be a future for them after her fated death, she bears Kiritsugu a daughter, Illyasviel von Einzbern. They live together for nine years in total before departing to Japan for the War.
While approving of Kiritsugu's ideal and willing to sacrifice herself for its sake, she does not truly understand that ideal, but only wishes to walk the same path as her beloved. However, in order not to burden Kiritsugu, she decides to behave as a woman who would die for that same ideal rather than a woman that would die for her husband. Her Magecraft involves the creation and forging of matter, as well as its applications. In terms of magical ability, she is stronger than Kiritsugu. Her weapons are thin, long and flexible wires, which she uses to produce an instantaneous homunculus with alchemy that attacks the enemy while changing itself into numerous shapes. She may also use her weapon to immobilize her target.
Saber


Voiced by: Ayako Kawasumi(Japanese); Kari Wahlgren[1] (English)
Saber(セイバー,Seibā) is the same character from Fate/stay night, the Servant who was summoned by and fell in love with Shirō Emiya.  Known as the King of Knights, Artoria Pendragon(アルトリア・ペンドラゴン,Arutoria Pendoragon), who obtained the magical "Sword in the Stone", she maintains a high code of honour. Stunned to discover that the legendary King Arthur is a young woman, Kiritsugu refused to speak to her directly since her summoning, which Saber initially believes is because he believes the fact that she is a woman makes her inadequate.  However, Irisviel later suggests Kiritsugu's anger towards Saber is out of the belief that he could not accept the decisions Saber made or allowed to be made in life yet he could not justify his reasons for why he believed she was wrong.
Though she and Kiritsugu are Servant and Master seeking the same ultimate goal of peace, their differing ideological perspectives result in a strained relationship where Kiritsugu does not directly acknowledge Saber. Believing the cause of the downfall of Britain to be her ineffective leadership, her reason for seeking the Grail is to wish for someone else more suitable and effective to lead Britain in her stead. This wish brings her into conflict with her fellow kings Archer and Rider, the former seeking to defeat her to revel in her despair of having her dreams shattered and the latter seeking to defeat her to convince her of the futility and absurdity of her goal, because he believes that Camelot falling was merely its fate, and that changing that would make the lives of those who protected it to the bitter end meaningless. She is annihilated after being forced to destroy the Grail and is returned to the aftermath of the Battle of Camlann. However, the act of Shirō taking on Kiritsugu's dream and ideals causes a ray of light to shine down upon Saber, signifying that her salvation is at hand.
She possesses three Noble Phantasms, the first of which is  Excalibur: The Sword of Promised Victory(約束された勝利の剣（エクスカリバー）,Ekusukaribā), which can generate a wave of destructive light from the tip when swung, capable of incinerating a large area. The second of her Noble Phantasms, Invisible Air: Bounded Field of the Wind King(風王結界（インビジブル・エア）,Inbijiburu Ea), is a barrier of wind which sheaths Excalibur and renders it invisible, making it hard for opponents to judge their distance and concealing Excalibur's identity. Her third Noble Phantasm is Avalon: The Everdistant Utopia(全て遠き理想郷（アヴァロン）,Avaron), the true sheath of Excalibur which provides limited immortality through constant regeneration, automatic healing of wounds and the ability to deflect any attack when activated.
Kirei Kotomine
Voiced by: Jouji Nakata(Japanese); Crispin Freeman[1] (English)
Kirei Kotomine(言峰 綺礼,Kotomine Kirei) is the Master of Assassin. Before the Fourth Holy Grail War, Kirei served as a priest under his father, Risei Kotomine. Although Kirei understood the distinction between good and evil, he could only revel in committing sins. Hounded by guilt and sorrow and with no alternative, Kirei prayed that, through marriage to a woman he loved, he could finally achieve respite from his tortured existence. When Kirei discovered marriage could not change him, he was on the brink of suicide; his terminally ill wife, filled with concern, committed suicide to show to Kirei that he could still feel compassion for others and died happy seeing her husband crying for her. However, after her death, Kirei was disgusted to realize he was crying because he had wanted to kill her himself; from that day on, he ceased pursuing salvation altogether.
Sometime later, he would become the apprentice of Tokiomi Tōsaka due to the wishes of his father, who wished to see Tokiomi obtain the Holy Grail. He participates in the War as a Master under Tokiomi's orders, serving as reconnaissance and support. While researching into the background of the enemy Masters, he sees his own emptiness mirrored in Kiritsugu, and though he initially likes him because of it, begins to feel a compulsive hatred for him after discovering that, unlike Kirei, Kiritsugu had a chance at normal happiness only to throw it away for his ideals. Conversely, Kirei is the only Master that Kiritsugu fears, the latter seeing him as the biggest threat to his own victory. During the later stages of the War, after goading from Archer, he accepts his own twisted inner nature and murders Tokiomi, becoming the Master of Archer and assuming the role of the main antagonist. Not having a true wish for the Grail, he continues to fight to  discover his purpose in life. He is killed by Kiritsugu in one-on-one combat but makes a wish on the Grail with his dying breath. This causes the Grail to set fire to part of Fuyuki, as well as giving Kotomine a fake heart made from its curses, reviving him. He then revels in the suffering of the people below, but his mood is soured when he sees Kiritsugu saving a young Shirō, realizing that, since Kiritsugu held onto his ideals even after their fight, he had been defeated on all fronts.
Supporting characters
Humans
Tokiomi Tohsaka(遠坂 時臣,Tōsaka Tokiomi)
Voiced by: Sho Hayami(Japanese); Marc Diraison[1] (English)
Tokiomi is the father of Rin Tōsaka and Sakura Matō, Master of Archer, and an arrogant and manipulative mage. He arranges for Kirei Kotomine to be his understudy in magic and his support in the Holy Grail War. He thinks highly of Kotomine and has him serve in all manners of affairs, appointing him as Rin's guardian should trouble befall him. He is skilled in fire manipulation, and employs a large ruby set in the end of a staff as his Mystic Code to help him shape and control flame. While a skilled magus and confident in his abilities, he is actually one of the weakest Tōsaka in history and considers himself as inferior in potential to Rin and Sakura, who were both recognized by Tokiomi as possessing extraordinary abilities from birth. Though he and Kiritsugu never have any actual one-on-one engagements, the two are perfect foils for one another, as Kiritsugu is a tech-savvy spellcaster who puts his job as a father ahead of his job as a magus, while Tokiomi is a traditional magus who puts his identity as a mage before all else. He eventually meets his end when Kotomine, who had been corrupted by Gilgamesh, stabs him in the back.
Aoi Tōsaka(遠坂 葵,Tōsaka Aoi)
Voiced by: Hasumi Ito(Japanese); Michelle Ruff (English)
Aoi is the mother of Rin Tōsaka and Sakura Matō as well as the childhood friend of Kariya Matō.  Though she is devastated by Tokiomi's decision to adopt away Sakura, she quietly accepts the decision due to the fact that she puts her position as the wife of a magus ahead of her position as a mother. She is tricked by Kotomine into believing Kariya had murdered Tokiomi out of jealousy, and declares that Kariya had "never loved anyone in his entire life" after the two get into a heated argument. This causes Kariya to finally snap and give in to his madness-fueled anger and lust. He strangles Aoi into unconsciousness in a fit of rage and gives her severe brain damage, leaving her both crippled and believing that her family is still whole. She dies sometime before the events of the original story.
Risei Kotomine(言峰 璃正,Kotomine Risei)
Voiced by: Masashi Hirose(Japanese); Michael Donovan (English)
Risei is Kirei Kotomine's 80-year-old father, a priest in the Church and the regulator of the 4th Holy Grail War. He is a friend of Tokiomi Tōsaka and actively supports him in a manner that borderlines on corruption. While he is proud of his son, who has demonstrated himself to be a perfect heir, Risei fails to understand Kirei in any sense. He is killed by Kayneth, but not before he is able to write a message in blood to Kirei about the location of the remaining command seals, which he uses in his final fight with Kiritsugu.
Waver Velvet(ウェイバー・ベルベット,Weibā Berubetto)
Voiced by: Daisuke Namikawa(Japanese); Lucien Dodge[1] (English)
The Master of Rider and future Lord El-Melloi II, Waver steals his teacher's artifact early on and uses it to summon Rider. He plans to use the Grail to force the Magus Association to recognize his genius. Despite his difficulties with Rider's overbearing nature, Waver and his Servant form a strong relationship.  Though lacking in practical experience in the field of fighting in a war, Waver, mostly due to his Servant, survives the Holy Grail War with little detriment to himself and develops a greater sense of perspective of the world, though he now harbors some bitterness towards Japan.
Maiya Hisau(久宇 舞弥,Hisau Maiya)
Voiced by: Ayumi Tsunematsu(Japanese); Carrie Keranen (English)
Maiya is an assistant to Kiritsugu Emiya. She is cold and professional, which makes it easier for Kiritsugu to act as he needs to. Maiya was originally a child soldier from a war-torn land who was rescued by Kiritsugu who taught her his way of life. Her real name is unknown; her current name was given to her by Kiritsugu when he first created false identity documents for her. Despite initial discomfort between them, she and Irisviel develop a mutual respect for one another out of their steadfast dedication to protect Kiritsugu. She is fatally wounded by Berserker (disguised as Rider) when she defends Irisviel and dies after Kiritsugu tells her that her mission is complete.
Natalia Kaminski(ナタリア・カミンスキー,Nataria Kaminsukī)
Voiced by: Akeno Watanabe(Japanese); Wendee Lee (English)
A freelance mercenary who sold information concerning Noritaka Emiya and his research on vampires. She rescues a young Kiritsugu after the latter kills his father and takes him as her apprentice. During her last mission, she is able to successfully kill a magus that could turn humans into ghouls through magic, but is killed when Kiritsugu shoots down the plane she is on to prevent the infected passengers from killing others when the plane landed. Kiritsugu's last words to her reveal that he viewed her as his mother.
Kariya Matou(間桐 雁夜,Matō Kariya)
Voiced by: Tarusuke Shingaki(Japanese); Liam O'Brien[1] (English)
Kariya is the uncle of Shinji Matō and Master of Berserker. He is the only member of the Matō family who truly loves Sakura Matō like a daughter, and harbors a very strong grudge against Tokiomi, who allowed his younger child to be adopted by Zōken. Kariya had previously left the Matō family ten years prior to the 4th Holy Grail War out of disgust for his own family, but returns and makes a deal with Zōken Matō that he will win the Grail War in exchange for Sakura's freedom. He is in love with Aoi (his childhood friend), although he stepped down after she chose to marry Tokiomi instead. Due to his lack of formal training, Kariya was implanted with the same magical worms as Sakura. This caused a number of side effects as the worms would literally eat away at their host, causing Kariya's health to progressively fail in return for significantly expanding his magic circuits and magical potential. By the time of his summoning of a Servant, Kariya's hair had turned white and the nerves on the left side of his face were dead. In addition, his natural lifespan had been shortened to such an extent that Zōken estimated he would only live on for one additional year. However, despite the Crest Worms and his own accelerated training, Kariya remained severely lacking as a Magus. At Zōken's behest, he compensated for this by summoning the most powerful of the seven Servant classes, the Servant of Mad Enhancement, Berserker. However, the high volume of magical energy required to maintain Berserker causes him frequent, severe pain. He dies after exhausting his energy and passes away while dreaming of Aoi, Rin, Sakura, and the life he wished he could have had with them.
Ryūnosuke Uryū(雨生 龍之介,Uryū Ryūnosuke)
Voiced by: Akira Ishida(Japanese); Johnny Yong Bosch[1] (English)
Ryūnosuke is the Master of Caster and a highly deranged serial killer who summons Caster after murdering a family and using their blood as a component in the summoning ritual.  He does not seek the Holy Grail, but follows Caster in order to find macabre ways to kill people and relieve his boredom, using a hypnotic charm to lure children to their deaths. However, Ryūnosuke does admit that he does in fact feel that there is something missing from his life and that, on some level, he desires to find it through his atrocities. He eventually becomes the primary antagonist of the first season, as the entire war is put on hold so as to stop his and Caster's rampage. He is killed by Kiritsugu, who shoots him in the stomach and head. Ryūnosuke does, however, die content with his life after seeing his first bullet wound and commenting on the beauty of his blood and intestines spilling out, having realized that the "thing" he had been searching for his whole life was his own death.
Kayneth El-Melloi Archibald(ケイネス・エルメロイ・アーチボルト,Keinesu Erumeroi Āchiboruto)
Voiced by: Takumi Yamazaki(Japanese); Doug Erholtz[1] (English)
The Master of Lancer, Kayneth is a nobleman from the Magus Association, Lord of the House of El-Melloi and a prodigy at magecraft, said to be the most talented participant in the Holy Grail War. His artifact is stolen by his pupil, Waver Velvet, but he manages to obtain another artifact and summon Lancer instead. While he holds the command spells for Lancer, the energy to materialize the Servant is maintained by Sola-Ui. Despite his skill, Kayneth's overly-traditional approach to combat causes him to underestimate his opponents' capacity for violence, as he believes that the Holy Grail War will be fought with honorable duels and tests of skill rather than quick blitzkriegs like those perpetrated by Kiritsugu and Kotomine. He is confident in his abilities and takes pride in his heritage, but finds the extent of Kiritsugu's untraditional and underhanded tactics both offensive and unexpectedly challenging to overcome. He loses his ability to use magecraft after being shot by Kiritsugu's Origin Bullet and is left half-blind and crippled. Sola-Ui then steals his Command Seals to make Lancer hers. After being forced to make Lancer commit suicide, he and Sola-Ui are sniped by Maiya so as to tie up any loose ends and avoid future retribution from the Archibald family. Kayneth is then killed by Saber as an act of mercy.
Sola-Ui Nuada-Re Sophia-Ri(ソラウ・ヌァザレ・ソフィアリ,Sorau Nuazare Sofiari)
Voiced by: Megumi Toyoguchi(Japanese); Karen Strassman (English)
The daughter of the head of the spiritual evocation division, Sola-Ui is engaged to Kayneth as a result of a strategic marriage arrangement and the decision of her family to entrust their crest to her brother instead.  However, she is coldhearted and does not reciprocate Kayneth's love for her; instead, she becomes infatuated with Lancer (likely due to his love spot), who in turn does not reciprocate her feelings and regards her only as his Master's wife. After Kayneth loses his magecraft abilities, Sola-Ui eventually steals his Command Seals by breaking his fingers until he gives them to her, only to lose them when Maiya cuts off her arm. She is used by Kiritsugu as a bargaining chip against Kayneth to force Lancer to commit suicide, and is then shot and killed by Maiya.
Zōken Matō(間桐 臓硯,Matō Zōken)
Voiced by: Masane Tsukayama(Japanese); Michael Donovan (English)
Zōken is a wicked, ancient, and powerful sorcerer and the patriarch of the Matō family. He was one of the original three Magi to propose the Holy Grail system, being the designer of the Command Seals, and keeps himself alive by use of worm familiars.  Having amassed a large and extensive library of sorcery knowledge, his lessons tend to be extreme and inflict a heavy toll on the body.  To conceal his status at the ancestor to the Matō family, he masquerades as a relative to his descendants; as such, he is Kariya's "uncle",[2][3] and Shinji Matō's "grandfather," and adoptive grandfather of Sakura Matō. Because the Matō blood had thinned and no longer produced heirs naturally capable of sorcery, Shinji was incapable of becoming a true sorcerer. Thus, Zōken offered to adopt Sakura Tōsaka into the Matō when her father, Tokiomi, decided to train only his older daughter Rin to become his sole successor.
Disappointed with the lack of sorcerous potential in Shinji and Byakuya, Shinji's father, Zōken blames Kariya for allowing the Matō's magical lineage decline since Kariya, despite being the first in many generations to be naturally capable of sorcery, left the family ten years before the start of the War. Kariya later returns and formulates a deal with Zōken where should Kariya obtain the Holy Grail, Zōken must allow Sakura to return to her family. Zōken does not truly believe that Kariya has what it takes to win the War, and only accepts out of a whim and the small possibility of success.
Servants
Archer(アーチャー,Āchā) - Gilgamesh(ギルガメッシュ,Girugamesshu)
Voiced by: Tomokazu Seki(Japanese); David Vincent[1] (English)
Archer is Gilgamesh, the same rogue servant in Fate/stay night, the King of Heroes. He takes great pride in claiming to be the first 'hero' ever to set foot on Earth, causing him to have a severe and sadistic God complex, treating all others as "mongrels" that are not worthy of laying eyes on him. He dislikes the presence of Saber and Rider in particular since they were kings like he was. Much to Tokiomi's displeasure, Gilgamesh has difficulty acting covertly or regaining his temper when his considerable pride is wounded. He is unique in that he possesses a very large number of Noble Phantasms, but only three are unique to him. He later allies with and corrupts Kotomine, helping him orchestrate the death of Tokiomi and assault on Aoi via Kariya. He kills Rider in one-on-one combat and later goes to claim the Grail for himself. He attacks Saber as part of their "wedding ceremony" but is interrupted by Kiritsugu, who has Saber destroy the Grail. Archer is drenched in the mud, but his ego allows him to resist corruption. He meets Avenger within the grail and tells him that it is the King's job to shoulder all the evil of the world, not his, but that he, as king, will permit Avenger's existence. Archer then escapes the mud with a flesh and blood body, but his personality becomes more destructive and impulsive due to his exposure to All the World's Evils.
His first unique Noble Phantasm, Gate of Babylon: The King's Treasure(王の財宝（ゲート・オブ・バビロン）,Gēto Obu Babiron) is a key-shaped sword which opens a rift in space to a mystical vault that holds countless prototypes of Noble Phantasms within. Archer can either draw them out for close combat or fire them out of the rift like bullets. The rift also contains assorted artifacts such as "the wine of kings" and a flying spacecraft from Sanskrit mythology, the Vimana. His second Noble Phantasm, Enkidu: Chains of Heaven(天の鎖（エルキドゥ）,Erukidu), is an anti-divine chain that binds enemies and becomes stronger the more divinity the target holds. His last unique Noble Phantasm, Enuma Elish: The Star of Creation that Split Heaven and Earth(天地乖離す開闢の星（エヌマエリシュ）,Enuma Erishu), is the attack generated by his drill-shaped sword, Ea: Sword of Rupture(乖離剣（エア）,Ea). When its true power is activated, it manifests itself as a massive rip in space-time, possessing unsurpassed attack power sufficient to damage and disintegrate the world itself.
Gilgamesh is the half-god, half-human king born from the union between the King of Uruk, Lugalbanda, and goddess Rimat-Ninsun with the purpose of being a medium between the Gods and humans, as he is both of these things and yet not quite either. He ruled the Sumerian city-state of Uruk, the capital city of ancient Mesopotamia in the B.C. era and was supposedly a transcendent being so divine that no others in the world could match him. He was a despot who believed he was invincible. He is not merely a legend, and is said to have actually existed and ruled during the Sumer Dynasty five thousand years ago. His tale is loosely based on mankind's oldest poem, the Epic of Gilgamesh which traditionally portrays Gilgamesh as a hero, destined to be king and achieve great feats, who is driven to meet his destiny, facing challenges together with his best friend Enkidu.
His title, King of Heroes, is not meant to call him a king who is a hero, but instead implies that he is a king over all heroes. His name is derived from traditionally being mankind's oldest hero and the origin to all myths, so his story is copied within the mythologies of all the countries of the world. Because of this, his Gate of Babylon possesses every hero’s Noble Phantasm.
Lancer(ランサー,Ransā) - Diarmuid Ua Duibhne(ディルムッド・オディナ,Dirumuddo Odina)
Voiced by: Hikaru Midorikawa(Japanese); Grant George[1] (English)
The First of the Knights of Fianna, Lancer possesses a love spot on his face, which causes females with insufficient magic resistance to fall in love with him should they gaze upon it. As a knight, he adheres to a code of honour in battle and a sense of loyalty to his master, being summoned to fight in the grail war because he wants to display the loyalty to his lord that he was not able to show when he was alive.  Despite being enemies, he and Saber share mutual respect for each other, and he considers it his duty to take her head, protecting her and aiding her on multiple occasions, in an attempt to ensure that he will be the one to kill her. Lancer fights at Mion river with the other heroic spirits, where he is forced to break one of his spears, Gae Buidhe, in order to allow the wound he inflicted upon Saber to heal so that she can use her noble phantasm, Excalibur, to destroy Caster. Later that day, during a one-on-one duel with Saber, Lancer is forced to commit suicide by Kayneth, and dies cursing his master, Sola-Ui, Kiritsugu, Saber, and the Grail for destroying his pride and last remaining wish.
Lancer possesses two Noble Phantasms: Gae Buidhe: The Golden Rose of Mortality(必滅の黄薔薇（ゲイ・ボウ）,Gei Bō), a short yellow spear which inflicts wounds that do not heal as long as the spear exists in the world, and Gae Dearg: The Crimson Rose of Exorcism(破魔の紅薔薇（ゲイ・ジャルグ）,Gei Jarugu), a long red spear which cancels mana upon contact, ignoring all magical defences and temporarily dispelling all magical attributes of the target struck.
Rider(ライダー,Raidā) - Iskander(イスカンダル,Isukandaru)
Voiced by: Akio Ōtsuka(Japanese); Jamieson Price[1] (English)
Rider's identity is Iskander, the King of Conquerors, famous in history as Alexander the Great, who desires to defeat Saber in particular because he believes her ideals regarding kingship are delusional and that she would thrive as one of his followers. He derives his status as Rider from a set of divine bulls and chariot purportedly a gift from Zeus, known as Gordius Wheel: Wheel of Heaven's Authority(神威の車輪（ゴルディアス・ホイール）,Gorudiasu Hoīru), summoned when Iskander slices the air with his Sword of the Kupriotes(キュプリオトの剣,Kyupurioto no Ken). His eccentric and overbearing personality along with his incredible abilities creates difficulties for his Master and their opponents. He is also the only Servant that Gilgamesh truly respects as an equal, the latter inviting him to challenge him in combat as many times as he wished. His wish is for a second life and he plans to wage war against the United States to celebrate his revival, believing they will pose an enjoyable challenge. He is killed by Gilgamesh in single combat and, in his dying moments, finally finds Oceanus, the place he had searched for all his life.
His first Noble Phantasm is Via Expugnatio: Distant Trampling Domination(遙かなる蹂躙制覇（ヴィア・エクスプグナティオ）,Via Ekusupugunatio), the trampling attack used by the Gordius Wheel, which causes lightning strikes upon movement, inflicting massive damage to whatever is in its path. His second and most powerful Noble Phantasm is  Ionioi Hetairoi: Army of the King(王の軍勢（アイオニオン・ヘタイロイ）,Aionion Hetairoi), which is a Reality Marble, a self-contained miniature world that contains thousands of the most trusted of his soldiers who fought alongside him in life resurrected as temporary Servants, marching upon an endless plain of sand.
Caster(キャスター,Kyasutā) - Gilles de Rais(ジル・ド・レェ,Jiru Do Rē),
Voiced by: Satoshi Tsuruoka(Japanese); Dan Woren[1] (English)
Commonly known as Bluebeard, his real name is Gilles de Rais - a mass serial killer who seems to favour killing children in particular. Caster is a fiendish Servant who derives pleasure from first providing his victims a moment of relief before terrorizing them and then killing them. He expresses an obsessive interest in Saber because he has mistaken her for Jeanne d'Arc, his former comrade and the protagonist of Fate/Apocrypha, with whom Bluebeard has an infatuation. As his wish for the Grail was for her to be resurrected, Caster becomes convinced he has won the War and repeatedly tries to talk to Saber; when she subsequently tries correcting him, he believes that she has lost her memories by God's intervention, much to his rage. He has, by far, the best relationship with his master of any servant. He sees Ryūnosuke as a prophet who preaches that God is a sadistic yet loving being that enjoys seeing His creations commit horrific acts, as He wouldn't have made the human race so violent and their organs so colorful if He did not enjoy chaos. This restores Caster's faith in God and he decides to put on a show for Him, to show Him that He isn't the only "entertainer" who can put on a show. The war is eventually postponed due to the duo's rampage, as Caster and Ryūnosuke had begun to murder hordes of children in hopes of catching God's attention and forcing Him to "return" Saber's non-existent memories of being Jeanne. Following Ryūnosuke's death, Caster is obliterated by Saber's Excalibur.
His sole Noble Phantasm is Prelati's Spellbook: Text of the Sunken Spiraled City(螺湮城教本（プレラーティーズ・スペルブック）,Purerātīzu Superubukku), a magical tome made from human skin which acts as a massive mana source and a guidebook for various spells of varying power, with the strongest spell capable of summoning otherworldly, self-regenerating monsters. The strength of his Noble Phantasm helps make up for his otherwise average ability in magecraft.
Berserker(バーサーカー,Bāsākā) - Lancelot of the Lake(サー・ランスロット,Sā Ransurotto)
Voiced by: Ryōtarō Okiayu(Japanese); Kyle Hebert[1] (English)
Previously known as the Black Knight, Berserker is a Servant who possesses the ability to use practically any object as a Noble Phantasm, allowing him to match Gilgamesh in combat. His madness has reduced him to a mindless, though dangerously skilled, fighter. Despite his insanity, he is still able to instinctively recognize Saber. When Saber finally learns Berserker's true identity, she is devastated that her decisions in life and her adherence to chivalry had caused her friend such suffering even after dying. During the battle it is revealed that his insanity stems from his overwhelming desire to be punished for his adultery with Guinevere and his own subconscious love for Saber, his sanity being eaten away as he was forced to watch the love of his life throw away her humanity for the sake of her people. He is killed by Saber as he is about to deal her a killing blow when his Master runs out of magical energy midway, and regains his sanity in his dying moments. His death almost drives Saber into darkness, as she becomes hellbent on gaining the Grail by any means.
He possesses three Noble Phantasms, the first of which is For Someone's Glory: Not For One's Own Glory(己が栄光の為でなく（フォー・サムワンズ・グロウリー）,Fō Samuwanzu Gurōrī), which envelopes him in a black fog that makes his outline blurred and his status unreadable to other Masters. By use of a Command Spell, it is possible to use the fog to allow Berserker to mimic another's appearance, although it is noted that had Lancelot been summoned under a different Class, he would be able to freely disguise at will. Knight of Honor: A Knight Does Not Die with Empty Hands(騎士は徒手にて死せず（ナイト・オブ・オーナー）,Naito Obu Ōnā), allows him to turn anything he recognizes as a weapon, into a D-ranked Noble Phantasm. If he grabs hold of others' Noble Phantasms, he claims them temporarily as his own and their original rank is retained, making it the perfect counter to Archer's attacks. His last Noble Phantasm, Arondight: The Unfading Light of the Lake(無毀なる湖光（アロンダイト）,Arondaito) is a magical sword which, when drawn, dispels For Someone's Glory and Knight of Honor, boosts all his parameters and grants him additional prowess against beings with a 'dragon' attribute such as Saber.
Assassin(アサシン,Asashin) - Hassan-i Sabbah(ハサン・サッバーハ,Hasan Sabbāha)
Voiced by: Sachie Abe, Takuo Kawamura, Eiichiro Tokumoto(Japanese); Karen Strassman, Patrick Seitz,[1] Vic Mignogna (English)
Assassin is actually the reincarnation of the head of the Assassin Order. While every Assassin in every Grail War thus recorded has shared the same name of Hassan-i Sabbāh, they are different persons as all the leaders of the Assassin Order changed their names to Hassan-i Sabbāh upon ascending to the position.
The Hassan-i Sabbāh in the Fourth War became head by intentionally fracturing his psyche during life to confuse opponents, a form of self-inflicted dissociative identity disorder. When summoned as a Servant, this ability manifests itself as the Noble Phantasm Zabaniya: Delusional Illusion(妄想幻像（ザバーニーヤ）,Zabānīya), which splits his body into up to eighty different entities, sharing his spiritual potential amongst them. They act as reconnaissance agents for Tokiomi and Kirei after Gilgamesh "kills" one of them. Assassin can only be truly defeated if all of them are killed, which they are after being massacred by Rider's Ionian Hetairoi.