Assassin (Fate/Prototype: Fragments)

Assassin (アサシン) is the Assassin-class Servant of Seiji Jinga in the First Holy Grail War of Fate/Prototype: Fragments of Blue and Silver. She later forms a new contract with Manaka Sajyou.

Identity
Assassin's True Name is Hassan-i-Sabbah, given the appellation of Hassan of Serenity (静謐のハサン), one of the nineteen people to hold the legendary title of "Old Man of the Mountain". It has been said that while alive she an expert in poisoning, the legendary "poison girl" told in many ages, many parts of the world starting from India of the BC era - fabricated by the assassination cult as a weapon, a tool for assassinations in real life. That is her identity. She has become the source of the urban legend by the name of Mary (メアリーさん).

She is known for silently take away the lives of kings, nobles and military generals in their sleeping quarters. In many cases, she would establish a relationship of lover or fiancee with her assassination target. In other words, she kept repeating the deed of building with her own hands an "artificial happiness" that would not be fulfilled, just to steal it away with her own hands. Gradually, her mind creaked. As for her final moments, maybe a general from a certain army took her head due feeling suspicious of her behavior of not even holding hands, or maybe she herself revealed her identity as an assassin and pestered the general "please, kill me..." Or maybe, she was put to the sword while the general has taken his eyes off her.

Appearance
Assassin's appearance is typical of those in her 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 the female personality of the Hundred-Face Hassan, her violet colored hair being another trait they share.

However, thanks to her Shapeshifting skill, instead of a hollowed out face, her face appears as that of a young and beautiful girl, a fine tool effective in drawing in men for her to feed from. Due the nature of her assassination methods, she has natural looks.

Personality
She had no qualm with killing her master and is ruthless in her feeding as she uses her own appearance as a bait to lure in potential food source.

As natural of her previous profession, Assassin 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 upon her encountering Assassin as to her presence in the Sajyou's home, while also analyzing her words for any potential holes and finding ways to cover them up.

Fate/Prototype: Fragments of Blue and Silver
Assassin uses Zabaniya: Delusional Poison Body to kill her master Seiji Jinga.

After she loses her Master, she 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 leads to the spread of the "Miss Mary" rumors. It is during one of these that she meets Manaka who becomes her new Master.

She is responsible for the deaths of Tatsumi Kitano and the Isemi Clan, using her Noble Phantasm to kill them.

During the last part of the war, she faces Saber to give Manaka more time and to prevent him from reaching the Greater Grail. However she winds up defeated by Saber's blade. Her last thoughts were of Manaka, her Master.

Other appearances
In Type-Moon's April Fools' Day 2015, Assassin is in a female group called Momoiro Hassan Z (ももいろハサンZ) and is part of the Imperial Roma talent agency, her class is Stealth idol (ステルスアイドル).

Abilities
Assassin's most notable trait is her Noble Phantasm, Zabaniya: Delusional Poison Body. Her body resists all sorts of poisons and, at the same time, is a lump of poison. Let alone her nails, even her skin and body fluids would act as deadly poisons. 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 to fry their brains in a few seconds, but any form of contact with her is fatal, no matter how small.

She possesses the skill of Independent Action. It is high enough for her to be able to survive for a few days after she kills her Master, while still consuming human souls.

Her 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, who look at her full of lust and disregard caution just to go to her. Even in her Servant form, she is still shown to be extremely alluring.

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