Alternate versions

Assassin (アサシン, Asashin?) is an Assassin-class Servant summoned by Ritsuka Fujimaru in the Grand Orders of Fate/Grand Order.



Assassin's True Name is Henry Jekyll & Hyde (ヘンリー・ジキル&ハイド, Henrī Jikiru & Haido?). The character that appeared in the novel of the 19th Century, "Dr. Jekyll and Mr. Hyde", or maybe the individual who became the model of the novel character. It has been said that he attempted to detach "evil" from his own personality, but instead revealed a personality that embodied "evil", eventually performing murders and in the end, self-destructed.[1]


FGO Assassin Dr Jekyll scene

Born and raised as a child of an affluent person, Henry Jekyll was a sincere person, having acquired a doctorate in the studies of medicine, civil law, jurisprudence, pharmacy, etc., and on top of that, acquired a Royal Society membership right after; he was going to be featured in a newspaper, and was a man celebrated as a philantropist to some degree. However, Jekyll was living in anguish. That is, he felt ashamed of the pleasurable nature hidden inside of himself, even though it was called a meager thing because it is possible to say that it is just something everyone has.[2]

Henry Jekyll has a reason to be obssessed with "evil". That is, it is a matter largely caused by the existence of the "Emperor of the Criminal World" he saw with his eyes while in the process of cooperating with a certain private detective's investigation activities in London. Performing works of evil. Works being done to anger others. Works contaminating goodness, disrupting order, and destroying the world. But for himself, before the "Emperor's" presence that is so far as described as overwhelming, who puts on an air of a transcendent person that is above every punishment, and who is located outside of the fate that befalls on society, Mr. Jekyll, who is a good person that acts with sincerity, was fascinated with the repulsiveness of evil.[2]

Good and evil. About humans, Jekyll believed they are not composed out of a single nature, but beings who must have a dual nature, and he attempted to detach all of his evil nature from his persona by means of chemical experiments. For the sake of denying evil that seems to be something everyone has, Jekyll relied on chemistry and alchemy. He attempted to separate the elements of good and evil with the assistance of his powers as a human.[2]

Jekyll refined and adminstered a dose to himself a special medicine. Although he used his own living body as the object of his experiment and as part of the experience, the experiment failed————However, he transformed into "Edward Hyde", who became the embodiment of evil. He became not only a different persona, but it also changed even his flesh. Because of "Hyde" arriving at a decision to dye his hands in blood to the point of committing murder and indulging himself in atrocities, Jekyll eventually decided to stop him for the sake of everyone, and it is said that he severed his own life. At the end of the struggle with Hyde, who exists as a second self originating from himself, Jekyll lost his life.[2]


Jekyll is a dual-existence that changes even his body as the personalities switch over.[1]


Henry Jekyll, who succeeded in materializing as a Servant, has come into existence as a dual-existence entity who can transform even his flesh while accompanied with his persona switching over. Due to his Noble Phantasm, he can change places with "Hyde", a persona who should be beaten by himself. Fight evil with evil. While holding an unbearable dilemma, it seems he will obey his Master as well. For sure this time, he believes he will attain the justice that was never yet fulfilled by himself.[2]

However, maybe due to being summoned as an Assassin, or maybe because of the Master he lost in a previous summon, or maybe because of other reasons, his Saint Graph is unnaturally warped, and Jekyll is currently unable to completely suppress Hyde.[1][2] He can barely contain and grasp a hegemonic hold over the other persona, and he has no conjecture of when he can suddenly change. Furthermore, even being summoned to Chaldea, Jekyll is struggling with the inside of himself.[2] However, this too shall probably be settled one day.[1] The conclusion of the conflict between good and evil is close.[1][2]


A sincere and rational good man——the original personality. To deeply think about things is both Jekyll's merit and demerit.[1] Although he has an obedient nature, in contrast to his calm appearance, he has a strong sense of justice and while alive, he was distressed in earnest concerning the "overthrowing of the evil that lurks inside humans", having researched it and tried to fight against it (and failed).[1][2] There is discord in his Saint Graph for some reason, and he is not able to establish confidence in himself.[2]

Jekyll displays an attitude in tackling things diligently, but if it is a battle, it seems he will become mostly dependent on Hyde for these situations. It is unsure to what extent of how helpful Jekyll himself is.[2]


  • Hyde

A hedonist without sense of morals——the "evil" personality.[1] Vulgar in violence.[2] An anti-hero of malice, the embodiment of evil intentions, that reflexively attempts to wound everything he comes in contact with.[1][2] An agglomeration of ill will lurking inside Jekyll, who is known as a sincerely virtuous person.[2] It is unknown if evil really lurked inside Jekyll's heart, if Hyde became a force of violence with evil largely dormant within him as a reaction to the existence of the ordinary Jekyll who was a virtuous person, or if "it amounted to only this much atrocity" consequently from Jekyll who has a scarce amount of and is being destitute of evil.[1][2] Hyde basically does not think about these things. He has no view of morality. He frequently acts reflexively towards everything before his own eyes. He is seen as the distortion within the Saint Graph for some reason.[2]

It is good for Hyde in the cases where he can act violently. He wants to act freely, as long as he is not bound by anything, and he wants to perform atrocities to his heart's content.[2]



Edison / Nikola Tesla / Babbage

Jekyll's ability to continue talking all throughout the night is compatible with Servants who are scholars.[2]

Lord El-Melloi II

"The so-called Clock Tower person. Moreover, he is from the 21st Century. Truly I'm intrigued."[2]


"Again and again, she would say "Today, too, your face is pale" as a pretext to keep an eye on me'."[2]

Paracelsus / Arthur

"It feels like déjà vu."[2]

Sherlock Holmes

"Mister Sherlock Holmes! How nostalgic. Thank you for helping me while we were alive——"[2]



Ritsuka Fujimaru

Because he is a good person, Jekyll agrees with the conduct of his Master in saving the world.[2]


Angra Mainyu

"All the World's Evil". He who became an anti-Heroic Spirit from a wish. To Hyde, who was born as "a person's evil desires", he is a target of aspiration. At any rate, this person is no more than an avatar of the "concept of evil". So what exactly is All the World's Evil...?[2]


Fate/Grand OrderEdit

London: Death World in the City of Demonic FogEdit

Jekyll appears in the "London" Singularity as an ally. He is a living person, who is in London when the "Demonic Fog" appears around it, isolating the city and beginning to harm people, as well as summoning Servants. Jekyll collaborates with Victor Frankenstein and Hans Christian Andersen to find out more about the fog and also allies with the Servant Mordred to dissolve the fog.

Jekyll meets with Ritsuka Fujimaru and Mash Kyrielight when Mordred bring them to meet him. Jekyll informs them of the situation and the fog surrounding London. They then agree to help him in finding out the origin of the fog, forming an alliance. Jekyll sends the group on multiple missions to combat the Servants summoned from the "Demonic Fog" and to fight the ones behind the fog, the leaders of the "Project Demonic Fog""M", "B" and "P". Jekyll later accompanies the group to the Clock Tower, to find out more information about the Holy Grail Wars. In Clock Tower, they are attacked by a large number of magic tomes that attack them. To combat them, Jekyll chooses to briefly transform into his alternate personality, Hyde, helping in the battle against the enemies.

Jekyll continues to guide Ritsuka's party throughout the rest of the Singularity.

Salomon: The Grand Time TempleEdit

Jekyll is amongst the "London" Singularity Servants to aid Chaldea against the Demon Gods Pillars.[3]


In his interlude, Dr. Jekyll and Mr. Hyde, Jekyll thanks Ritsuka and Mash for letting gain control of Hyde after they travelled to London. Romani Archaman tells them to leave since their presence may hinder the correction of the era. However, Jekyll decides he wants to visit the apartment of the "him" who helped Ritsuka and Mash. Romani tells him though that Jekyll should have been returned to his original era after the Singularity was resolved. But Jekyll still persists, wanting to tell him that he can overcome Hyde without resorting to suicide. Entering the apartment, Jekyll attacks his past self, and turns into Hyde. The past Jekyll decides to help fight Hyde. He reveals he is a Servant that materialized from the remains of the Demonic Fog after his living self returned to his era. He predicted Hyde would come after him so he waited in his apartment until the time came. After Hyde is defeated, the past Jekyll warns him not to forget himself. He then disappears telling Ritsuka and Mash to give Mordred and Frankenstein his regards. Hyde turns back into Jekyll after Romani explained his past self would have disappeared eventually since his summoning was unstable. Jekyll acknowledges he is also Hyde, and wishes to challenge him again one day. 


If he has been summoned into a different class, Jekyll would possess practically no combat ability. The reason why Jekyll is endowed with combat ability as a Servant in Fate/Grand Order is because it is conjectured that the brutality as well as the persona of Hyde is being taken out and dissolved into Jekyll due to the abnormality of his Saint Graph.[2]

While Jekyll is of the Assassin-class, he turns into the Berserker-class as Hyde upon using Dangerous Game, the elixir (miracle drug) that allows for the transformation of Jekyll into Hyde and vice versa. This incarnation of Berserker is different than when Jekyll/Hyde is manifesting as a Berserker in that he retains his human form, as well as more of his sanity and reason. The difference in transformation performed between being an Assassin and being a Berserker lies in his Self-Modification Skill. The Skill would be limited by the Assassin class. However, being summoned in the Berserker class would give rise to a cumulative effect of this Skill combined with Mad Enhancement, no doubt turning him into a beast that hardly resembled humans.[2]


Creation and ConceptionEdit

Nakahara is the character illustrator for Dr. Jekyll and Mr. Hyde. Hikaru Sakurai is the scenario writer for their characters in Fate/Grand Order.


  1. 1.00 1.01 1.02 1.03 1.04 1.05 1.06 1.07 1.08 1.09 1.10 1.11 1.12 1.13 1.14 1.15 1.16 1.17 1.18 1.19 1.20 1.21 1.22 1.23 1.24 1.25 1.26 1.27 1.28 1.29 1.30
  2. 2.00 2.01 2.02 2.03 2.04 2.05 2.06 2.07 2.08 2.09 2.10 2.11 2.12 2.13 2.14 2.15 2.16 2.17 2.18 2.19 2.20 2.21 2.22 2.23 2.24 2.25 2.26 Fate/Grand Order material III - Henry Jekyll & Hyde, p.072-081, translated by crow_claw at Reddit and TwilightsCall at Beast's Lair.
  3. Fate/Grand Order - Salomon: The Grand Time Temple - Act 05: IV / Control Tower Barbatos
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