Assassin (アサシン, Asashin?) is an Assassin-class Servant able to be summoned by the Protagonist in the Grand Orders of Fate/Grand Order. He was Grand Assassin (グランドアサシン, Gurando Asashin?) until he removed himself of his rank of "Grand" during the battle with Tiamat.



Assassin's True Name is "Old Man of the Mountain" ("山の翁", Yama no Okina?), the first to hold the title of Hassan-i-Sabbah', the founder of the Hashashin where he is considered to be both the first and the last "Old Man."  He is given the nickname of King Hassan (キングハサン, Kingu Hasan?) by Ritsuka Fujimaru, to which he takes a liking. Even so, his actual identity was unknown even to the eighteen individuals who came to inherit his titles. Proof that he in fact existed is nowhere to be found -- except in the certainty that if ever he who takes the seat of Hassan-i-Sabbah strays from his path, there shall come an executioner to part him from his head.[1]

There was within the sect of the Hashashin not a single witness who could attest to the existence of the original Hassan; all of those who encountered him met their end. He who forged the name of "the Old Man of the Mountain" elected to live as an observer who would enact judgment upon the rot and the deviations of the sect. Even though the sect persisted in righteous accordance to the doctrine of Allah, it was inevitable that those avowed to carry it forth would come to sin in the eyes of Man. Thus, for the preservers the doctrine to lose themselves to the desires of man was to the Old Man of the Mountain all the more a sacrilege against Allah.[1]

Namely, the corruption of the sect’s leader, the current Old Man of the Mountain, would mean the decay of the sect. Whether that leader suffered from a corrupt spirit or declining skills, such a person must not bear the name of the Old Man of the Mountain. To decline was to die. He took their heads in forgiveness of their sin, and passed down hope to the next Old Man of the Mountain.[1]

He chose to fight head-on with a greatsword rather than hidden weapons, in honor of his solemn duty to assassinate assassins. To lay eyes upon his skull mask meant that one’s life was over. After bringing the hammer down upon fools who strayed from the doctrine of the order, the skull-masked swordsman would erase anyone who had witnessed him from the world.[1]

It is said that he, who sent many Assassins to oblivion, remained in the shadows until the destruction of the assassin order. The skull-masked swordsman was a living legend, the abyss of assassins, whom no one has ever witnessed.[1]

In the 6th Singularity, it is given that he resides within the Holy Shrine of Azrael (アズライールの聖廟, Azurai-ru no Seibyou?), a mausoleum situated in a mountainous region somewhere to the north of Jerusalem.


An assassin wearing a skull mask.[1]


The Old Man of the Mountain comes off as quite the stern and straight-forward individual. He possesses extremely low tolerance for impoliteness, as he almost immediately annihilated the protagonist's group upon their uninvited visit to his temple.

However, he is far from being heartless, simply a man with unshakable faith and strict code of conduct. He was willing to hear his visitor's plea for aid and accept it, but only on the condition that one of the Hassans be willing to die for it.

In his view, for a Hassan to plea for aid, even from their own kind is a grave dishonor to their name and faith, as they are those who must rely on their own individual strengths to preserve through trials and slay their targets. Any Hassan who grows weak and/or becomes reliant on the strengths of others must be dealt with by his blade.


Fate/Grand OrderEdit

Camelot: The Holy Domain of the Round TableEdit

The Old Man of the Mountain resides in the Holy Shrine of Azrael in the "Camelot" Singularity. He remains neutral when the Lion King and her knights invade the Holy Land and establish the Holy City. However, when Ozymandias plans an attack against the Hashashin that protect the mountain villages, The Old Man of the Mountain sneaks into Ozymandias' territory and manages to cut off his head and disappear afterward. Although Ozymandias survives, he does feign from attacking the Hashashin.[2]

Approaching the confrontation against the Lion King's forces, Chaldea and the Hashashin attempt to request aid from the Old Man of the Mountain, in order to combat Gawain, traveling to his shrine.[3] Upon approaching the shrine, the Old Man of the Mountain puts forth trials to test the characters of the group, by taking control of Hassan of Serenity who the group manages to defeat. The Old Man of the Mountain thus agrees to aid them, but also telling them that requesting his aid was equivalent in meaning to forfeiting the life of the Hassan of the current generation, Hassan of the Cursed Arm. However, he relents from enacting his customary cost on account of the circumstances of the Singularity. He also sends the group to search the Atlas Institute in the desert to uncover secrets of the Singularity.[4]

During the final battle against the Holy City, the Old Man of the Mountain does appear, concealing the forces of Chaldea and confronting Gawain. He uses his powers to cover the Sun with sand, weakening Gawain. They fight each other for some time until the Old Man of the Mountain releases the Sun, as it is no longer necessary. Gawain attempts to use this opportunity to attack him, but the Old Man of the Mountain still deflects him. He then retreats, claiming that his blade only shall point toward those the err against the will of Heavens, much to Gawain's dismay.[5]

Babylonia: The Absolute Frontline in the War Against the Demonic BeastsEdit

Initially taking the appearance of an old, bearded vagrant and assuming the name of Ziusudra (the hero of the Sumerian flood myth), he awaits the protagonist in the city of Uruk -- apparently to again test the protagonist's character. Subsequently, during the protagonists' exploratory mission to the abandoned city of Cuthah, he intervenes when the protagonist's soul is drawn into the Underworld by Ereshkigal.

“You who cannot die -- cannot be said to have ever lived.”

—the Old Man of the Mountain, to Tiamat

In the finale of the Singularity, the protagonists are able to temporarily trap Tiamat within the Underworld by the assistance of Ereshkigal and Ishtar -- aiming to utilize the Anti-Divinity property of the territory of the Underworld to weaken her. In the midst of Tiamat's attempt to escape to the surface, the Old Man of the Mountain intervenes by slicing off Tiamat's wings and imposing the Concept of Mortality upon her -- stating to the protagonists that he has removed himself of the title of "Grand Assassin" for the opportunity to strike against an Evil of Man. He participates as a guest in the second-to-final confrontation with Tiamat.[6]

Abilities Edit

Differing from his successors, the Old Man of the Mountain terminates his targets not by imposing physical harm, but by severing 'fate' itself by way of an ability similar to the Mystic Eyes of Death Perception.

The Old Man of the Mountain exercises his abilities by the use of a sword. In terms of skill in swordplay, he is said to be more than a match for the knights of Camelot; able to duel with Gawain while holding the advantage and capable of blocking a strike from Excalibur Galatine with his cape alone, he is capable of creating sandstorms at will and eliminating abstract concepts such as communications with Chaldea or Ereshkigal's alliance with the goddesses opposed to Babylonia. He is furthermore capable of imposing "the concept of death" upon immortal existences such as Tiamat. He has shown usage of blue flames to move in manners akin to teleportation, such as moving behind or above targets, or strike his opponents with multiple strikes in a single swing and creating explosions from a distance.

Assassin's currently revealed Noble Phantasm is known as Azrael. His personal skills are Battle Continuation and Protection of the Faith.

Assassin has given up his right to be a Grand Servant as of joining Chaldea. Grand Servants exist for the sake of saving mankind, so the position must be discarded to serve as the Protagonist's Servant. Even though his status is removed, his Saint Graph still remains Grand-class for a short time after, not immediately losing power after becoming a normal Assassin. The power of the Saint Graph was utilized in the strike to grant Tiamat a concept of death, and his Saint Graph became that of a normal Servant's afterward.[7]

Presence ConcealmentEdit

Presence Concealment is the Skill to erase one’s own presence. It is the vestige of an ability he learned long ago. The swordsman bears a powerful curse which makes his presence known those whom he will kill next, even if he achieves a perfect success on a check to conceal himself.[1]

Evening BellEdit

The Evening Bell (晩鐘, Banshou?) signals the announcement of funereal proceedings and the visitation of Death. This unique skill manifests as a result of having become one with the rites of passing. The swordsman of the Evening Bell is without agency in his choice of opponents. He brings salvation to those who have lost sight of their mortality in the place of God.[1]

“…Canst thou hear this bell? It tolls for thy destiny’s end. Accept it, and unbind thy soul, for this is thy last chance as a human to slumber in peace”

—King Hassan


  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 Fate/Grand Order - Old Man of the Mountain, Translation by chaldeum
  2. Fate/Grand Order Camelot Chapter 15
  3. Fate/Grand Order Camelot Chapter 10
  4. Fate/Grand Order Camelot Chapter 11
  5. Fate/Grand Order Camelot Chapter 17
  6. >Nasu: Personally, I feel that joining Chaldea means that you must throw away the right to being a Grand that exists for the sake of saving all mankind. Still, even after discarding that position, the strength of King Hassan’s Saint Graph itself is still Grand-class. It doesn’t mean that once he loses his Grand position and becomes a normal Assassin, his Saint Graph would immediately lose power. So, by using all the might in that superb Saint Graph, the strike that “granted the concept of death” could be performed. And afterwards, King Hassan’s Saint Graph became that of a normal Servant’s.