Alternate versions

Berserker (バーサーカー, Bāsākā?) is the Berserker-class Servant of Tatsumi Kitano in the First Holy Grail War of Fate/Prototype: Fragments of Sky Silver



Berserker's True Name is Dr. Jekyll and Mr. Hyde (ジキル博士とハイド氏, Jikiru-hakase to Haido-shi?).


Berserker, as Hyde, has an appearance similar to a werewolf with black fur covering his body, a large jaw, sharp fangs, and a beast-like, humanoid form. His eyes glow upon seeing the full moon.

As Jekyll, he is shown to be fancily dressed in a white dress shirt, an olive green vest, and a black and grey jacket draped across his shoulders. He wears a black and white cravat with a red jewel around his neck, and leather gloves over his hands.

After Jekyll is corrupted by the Holy Grail, he takes on a darker appearance. Jekyll now wears black clothes and has gold eyes.

Since Hyde has also become the main personality as a result of the corruption. he can only maintain his human form for an hour at most. But when he does become human, Hyde takes on a appearance similar to his Assassin form only now he has fangs and claws where his hands are supposed to be.

Hyde also emits a black miasma from his mouth.


Berserker, as Hyde, is insane and uncontrollable due to Mad Enhancement. As Jekyll, he is well-mannered and kind, going so far as to offer to teach his Master what he knows of Alchemy if he were to wish it.

After Jekyll is corrupted by the Holy Grail, Hyde becomes the main personality.


Fate/Prototype: Fragments of Sky SilverEdit

Berserker, as Hyde, hunts Masters and Servants during the night. At one point, Berserker attacks Misaya Reiroukan as she is walking through her family's forest, but she is saved by Saber. He is then first seen in the light of Saber's Excalibur, and displays fear towards the sword.

After his master is killed, Berserker makes one last attempt to take down the Reiroukan Master before he fades away. He then becomes the first Servant to be defeated in the Holy Grail War of 1991, as he is killed by a combination of attacks from almost all of the other Servant's weapons including Saber's sword, Archer's arrows, Lancer's 5-strike combination and by one of the blasts emanating from Rider's solar ship Noble Phantasm, Mesektet.

During Saber's battle with the Beast, Berserker appears again in Saber's mind. He encourages Saber to fight and then becomes one of the Servants who lends Saber his power when Saber activates Excalibur.

8 years later, a shadow of Berserker is seen again as one of Manaka's Grail corrupted Servants.



Berserker's parameters under Tatsumi

Berserker usually keeps himself in his Jekyll form. He states that, while he is in this form, even though he is still an existence that a human should not be able to match, he is powerless compared to other Servants. However, in exchange for this, he lacks the unique presence that Servants give off, granting him Presence Concealment, which is usually limited to the Assassin class.

In his life, Berserker considers himself to have been a great scholar. While he limited himself to subjects that were not related to Magecraft for the most part, he does say that he has some skill at alchemy and would be willing to teach his Master if he so wished.

His Noble Phantasm is Dangerous Game, the transformation elixir, which allows him to turn into Mr. Hyde, the second personality inside his body that claimed so many victims in his life. Upon drinking it, his form changes, becoming covered in black fur, his spine cracking, his muscles expanding and growing long canines and sharp claws and his eyes becoming blood red, making him somewhat similar in appearance to a werewolf. In this form, his stamina greatly increases, as well as his strength and speed. He gains several skills that make him suitable for close quarters combat, most noticeably, a skill that he calls "Restructuring", which grants him a high enough recovery ability, so that he is confident that he can recover even from being hit by a Noble Phantasm.

He shows himself able to endure Caster's heavily layered defenses and break into his Bounded Field, but he only is able to fight Saber for a small amount of time since he is being burdened by the barrier and because his master is inexperienced.

He also proves himself worthy of his boast regarding his recovery ability, as even with his Master dead and not possessing any form of Independent Action, he is able to survive for a sizable amount of time even while facing Archer, Lancer and Saber at the same time and being wounded by them several times. Even after he is hit by a beam of light by Rider, he still has enough strength left to attack Saber, requiring the swordsman to stab him through the heart before he is ultimately brought down.

Forms and Alternate VersionsEdit



Berserker is revived by Manaka Sajyou in the Second Tokyo Holy Grail War in a blackened form. Hyde is the dominant personality in this form.


Creation and ConceptionEdit

Nakahara was the character designer for Dr Jekyll.


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