Alternate versions

Assassin (アサシン, Asashin?) is the Assassin-class Servant of Seiji Jinga in the First Holy Grail War of Fate/Prototype: Fragments of Sky Silver. She later forms a new contract with Manaka Sajyou. She is summoned by Ritsuka Fujimaru in the Grand Orders of Fate/Grand Order.



Assassin's True Name is Hassan-i-Sabbah, one of the successive Hassan-i-Sabbah who served as the “Old Man of the Mountain”, the founder of the Assassins; during her lifetime, it is said that she is a master of poison who possessed the alias of the "Hassan of Serenity" (静謐のハサン, Seihitsu no Hasan?).[1][2] She has become the source of the urban legend by the name of Mary (メアリーさん, Mearī-san?).


The legendary “Poison Girl (Visha Kanya)” spoken of in every era all over the world, the narration beginning first with India of the BC era, put together by the Assassins as a weapon, a tool of assassination, in real life.[1][2] That is her identity.[2] The outward appearance of a beautiful girl is a purely trifling matter. Her body resists every single poison, while simultaneously, it is a lump of poison too. Not only her nails, but even her skin and bodily fluids would act as deadly poison as well, quietly and completely snatching away the lives of kings, nobles and generals in their sleeping quarters––––[1][2]

Although she killed many people, she would also frequently establish a relationship with her assassination target(s), such as a lover or a fiancée. That is to say, she continually repeated the deed of constructing with her own hands a “false happiness” that could not be realized, only to steal that happiness away with her own hands. Gradually, her mind creaked.[1][2] Her mind was expected to be tempered and toughened thoroughly, seeing that she was employed and made use of as a “Poison Girl” built up by the Assassins, but…[1]

In her last moments, maybe her head was decapitated by a general from a certain army who suspected her behaviour of not even holding hands, or maybe she exposed her true character as an assassin and begged the general to “please, kill me”–––––or maybe, she was put to the sword by someone’s hand during the gap where the general incidentally took his eyes off her.[1][2]


An assassin who wears a skull mask.[1][2] Serenity's appearance is typical of those in her Assassin Order. Like all of the other Hassans, she wears a black, form-fitting outfit and the traditional Hassan's skull mask. Her outfit is very similar to the one worn by Asako of the Hundred-Faced Hassan, her violet-colored hair being another trait they share.

Unlike the Cursed Arm Hassan, Serenity never actually carved out her face as it was one of her greatest tools. Her "face" during infiltration missions is basically something created through the Shapeshift Skill, but the "face" in her third stage Ascension is her natural looks. Due to the nature of her assassination methods, she has natural looks.[2] Her shapeshifting allows her to better refine her features to lure in her targets.


As her name implies––––– a calm female assassin. Obedient, and lacking self-assertion. While she was alive, she was merely a girl who conducted assassinations very mechanically. Even now where she became a Heroic Spirit, those characteristics have not changed as much. However, towards people who does not die even if they had touched her, she is quietly fanatical, and she shows devotion to them.[1]

Would one live if they touch her, or would they die? This is the point she views as the most important.[1][2] For example, if the Master has a strong resistance to poison, it would be something serious to her. She will cuddle up.[2] If it is the former, it seems she would dedicate her unconditional loyalty. If it is for the sake of her master, she will do literally anything. For example, even if a genocide comes about, her facial expression does not even change, and she displays obedience without even talking back. Concerning her, who naturally accepts that “everyone will die if they touch me”, the existence of “a master who does not die even if they touch me” becomes her best delight.[1]

As an assassin, Serenity is very pragmatic with her methods. After losing her first Master, she took to killing other men to maintain her existence by luring them to her thanks to her appearance.

As natural of her previous profession, Serenity is quite skilled at deception, particularly in lying to others. She was able to quickly come up with a believable lie to explain to Ayaka for her presence in the Sajyou's home upon their encounter, while also analyzing her own words for any potential holes and finding ways to cover them up.

If Serenity had a wish, it would likely be able to love and touch another without killing them. It was for this reason that she likely did not stop Seiji from trying to kiss her, which resulted in his death, and why she chose to follow Manaka as she was unaffected by Serenity's poisonous body.



Although, even if by any chance he died once due to her poison, if it is with the effect of that hero’s Noble Phantasm, he should be “unable to die a second time to the same poison”–––––In other words, he truly…?[1]


Unexpectedly, a companion who would not die even if he had touched her. Poison is ineffective against him…[1]

Since the Hassan of Serenity’s Saint Graph in “Fate/Grand Order” is a “different person” of sorts who possesses absolutely no information about a “particular Holy Grail War”, she cannot completely understand Arash’s motive of why he comes to talk to her as if they are indeed familiar with one another.[1]


A person who worries for her by keeping an eye on something about her. During Valentine’s, he was a great help.[1]

Servants who show romantic feelings towards the Master

Towards her rivals, she turns her gaze at them with a clammy atmosphere. Given that she has no assertiveness, she only stares at them in silence.[1]


A peerless brave warrior of the Celts who, having heard about those who would die from touching her, was far from faltering at that news, and he is in a state of having a curiosity for this person, saying “that person is great!” “Oh, there was no man who can endure you for more than a single night?” “That is even more amazing![1]

Caster of the Nightless City

Someone to consult with for a Fergus Countermeasure.[1]


Fate/Prototype: Fragments of Sky SilverEdit

  • "From the moment that I killed you, I've been in love with you..."

On the first day of the Holy Grail War, Assassin is summoned by her Master, Seiji Jinga, in an abandoned warehouse in the Tokyo Port area. Going up to Assassin, Seiji instantly gets captivated by her allure and despite Assassin being not very conscious, makes the mistake of kissing her.

Seiji then dies by Assassin's Zabaniya: Delusional Poison Body, making him the first Master to be killed in the 1991 Tokyo Holy Grail War, albeit accidentally.

After she loses her Master, Assassin takes on a human appearance in order to lure men to their deaths. She then consumes their souls in order to maintain her existence, which lead to the spread of the "Miss Mary" rumors. It is during one of these acts that she meets Manaka, who then becomes her new Master.

Assassin is responsible for the deaths of Tatsumi Kitano and the Isemi Clan, using her Noble Phantasm to kill them. She killed many men; however, after the act, she finds that she cannot stop thinking about Tatsumi, whose peculiar behavior of trying to protect her while knowing that she would kill him had left her with confused emotions.

Caster would later retrieve Tatsumi's corpse and revive it as a Living Dead, before presenting him to Assassin as a gift in order to divert her attention away from Manaka. While initially horrified, she came to cherish her time with Tatsumi and fell in love with the boy, who she could now embrace and kiss as she desired without killing him again. She later assists in the battle with Rider, as well as the one against a maddened Lancer, losing an arm to Lancer in the battle. Later on, when Tatsumi's reanimated corpse has developed enough sentience to attempt to stop Manaka from sacrificing the lives of innocent girls and Manaka prepares to kill him, Assassin unthinkingly wraps her arms around Tatsumi, crying hysterically as she desperately pleaded for her Master to spare him.

Afterwards, knowing everything would soon be coming to its end, Assassin came to understand that what she was doing was a mere mockery of the life she had wished for, so in an act of mercy, Assassin tearfully apologizes for keeping Tatsumi with her for so long, confesses her love she felt for him since the moment she killed him, and finally put the boy to rest.

During the last part of the war, Assassin faces Saber to give Manaka more time and to prevent him from reaching the Greater Grail in a final act of duty and loyalty to her. She winds up being defeated by Saber's blade. As she fades away, she battles against herself between her devotion to Manaka and her feelings of wanting to protect Tatsumi's younger sister, who was also in the town. Her last thoughts were of Manaka who, like her, also came to love someone.

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

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

Fate/Grand OrderEdit

Camelot: The Sacred Round Table RealmEdit

The Hassan of Serenity appears as an ally in Camelot, first appearing in the fortress in a dungeon as a prisoner of Agravain.

Salomon: The Grand Time TempleEdit

The Hassan of Serenity is amongst the "Camelot" Singularity Servants to aid Chaldea against the Demon Gods Pillars.[3]

Other appearancesEdit

The Hassan of Serenity is briefly mentioned in Fate/strange Fake by False Assassin.
TMAPRIL 2015 Momoiro Hassan Z

Type-Moon April Fools' Day 2015

In Type-Moon's April Fools' Day 2015, the Hassan of Serenity is in a female group called Momoiro Hassan Z (ももいろハサンZ, Momoiro Hasan Z?) and is part of the Imperial Roma talent agency. Her Class is Stealth Idol (ステルスアイドル, Suterusu Aidou?).



Assassin's Parameters

The Hassan of Serenity's most notable trait is her Noble Phantasm, Zabaniya: Delusional Poison Body. Her body resists every single poison, while simultaneously, it is a lump of poison too. Not only her nails, but even her skin and bodily fluids would act as deadly poison as well.[1][2] It makes the entirety of her body poisonous to the touch, and even the sweet aroma that emanates from her is poison in and of itself. She prefers embracing her victims and kissing them on the lips, using the poison of her mucous membrane to fry their brains in a few seconds, but any form of contact with her is fatal, no matter how small. When she was Blackened by Manaka and became an Alter, she gained the abiltiy to control the Grail Mud as if it were water of a poisonous sea. Whether this was made an extension of her Noble Phantasm or a seperate, related ability is unknown.

The Hassan of Serenity possesses the Skill of Independent Action. It is high enough for her to be able to survive for a week after she kills her Master, all while still consuming human souls.

The Hassan of Serenity's Shapeshift Skill allows her to disguise herself. She usually takes on the guise of a pure and innocent looking maiden, and her appearance is extremely bewitching to men, of which they look at her with full of lust and with a disregard to caution, just to go to her. Even in her Servant form, she is still shown to be extremely alluring.

Just like the other Hassans, the Hassan of Serenity also wields dirks for both short-range and long-range combat, slicing up her opponents in an instant with dance-like movements. However, unlike the dirks wielded by the Hassan of the Cursed Arm or the Hassan of the Hundred Faces, her personal dirks are white kunai-shaped daggers.

Door to Paradise (楽園への扉, Rakuen e no Tobira?) is a Skill the Hassan of Serenity possesses that is fundamentally not used in "Fate/Grand Order".[1]

Forms and Alternate VersionsEdit



Assassin is revived by Manaka Sajyou in the Second Tokyo Holy Grail War in a blackened form.


Creation and ConceptionEdit

  • Original Design

Nakahara is the character illustrator for Hassan of Serenity.[1][2] Hikaru Sakurai is the scenario writer for her character.[1]

Comment from IllustratorEdit

"I drew her with the feeling of reallyyy wanting to make her happy. Above all, it is because it seems fun for one being at Chaldea. It is good, isn’t it? In relation to her design, I used elder sister Asako of the Hundred Faces as her base. She is similar to an imp, to a black cat. Since she is a child who likes cute things, it is satisfying to give her cute items as well as accessories too."[1]


  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 1.31 1.32 1.33 1.34 1.35 1.36 1.37 1.38 1.39 1.40 1.41 1.42 Fate/Grand Order material IV - Hassan of the Serenity, p.130-137, translated by Clyton at Beast's Lair.
  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 2.27 2.28 2.29 2.30 2.31 2.32 2.33
  3. Fate/Grand Order - Salomon: The Grand Time Temple - Act 07: VI / Spy Satellite Amon
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