Caster (Fate/Grand Order - Gilgamesh)

Caster (キャスター) is a Caster-class Servant able to be summoned by the Protagonist in the Grand Orders of Fate/Grand Order.

Identity
Caster's identity is Gilgamesh. The supreme wise king who returned from the journey of immortality. In legends, he has been described as “the one who saw everything”. At times ruthless, at times approving of human nature; the great king of Uruk that strictly lead the masses. Upon returning from his search for immortality, he found in a decaying state due to his negligence. Since then he has dedicated himself to repairing and maintaining his kingdom, assisted by the chief priestess,.

Personality
As a caster Gilgamesh has a more mature mindset, he comes from after his journey to find immortality. In this form he is considered as a wise king by the people of Uruk.

"Hahaha, that becomes clear as day when you look at the alignment! I can overcome most penances and ordeals, but death from overwork is the only thing I never want to experience again!"

- Gilgamesh

Differently from when he is an Archer, his way of being in this form is not of a hero that personifies raging power, but that of a wise king that governs the masses.

Babylonia: The Absolute Frontline in the War Against the Demonic Beasts
He appears in this Singularity as his living self. Months before the crew of Chaldea arrives, when Solomon sent a Grail to Mesopotamia, Gilgamesh's clairvoyance showed himself standing in ruined Uruk with all of his subjects dead. Realizing doom is inevitable, he set out to fortify Uruk and gather enough materials to build the North Wall, the Absolute Frontline, to ward off encroaching demonic beasts as well as a hidden breakwater. In order to prevent the future he saw, he also sealed Babilu and become a mage, summoning Merlin with seven other Servants. Though he made clear to his subjects that no one will survive after six months, the citizens still followed his war effort.

When Merlin brings the Fujimaru, Mash Kyrielight and Anna to him, he is unimpressed and declares the problem at hand should be solved by people of the contemporary era. However after they have helped out in the city for nearly a month, he starts tasking them with mission regarding the war.

In a fail attempt to evacuate the city of Nippur, Tiamat-Gorgon breaches the North Wall, killing Leonidas and presumably Ushiwakamaru, only delaying her siege of Uruk for ten days due to being cautious against the other two Goddesses. To turn the tide, Gilgamesh tasks Fujimaru to bribe Ishtar into an alliance, who is later revealed to be protecting citizens in her own way and is in fact not part of the "Alliance of the Three Goddesses".

He then sent Fujimaru to Eridu, to deal with the suddenly attacking Quetzalcoatl and obtain the Axe of Marduk. Fujimaru soon realizes Quetzalcoatl is actually protecting humans and allies with her. At the same time, Ereshkigal takes advantage of Gilgamesh's overworking and reaps his soul to the Underworld. He is ultimately rescued by Fujimaru and gains Ereshkigal's alliance.

After Tiamat-Gorgon's defeat and the awakening of the real Tiamat, he devises the plan to lure Tiamat to the Underworld, where nothing is alive and thus Tiamat can supposedly be killed, and attempts to buy time for Ereshkigal to finish her trap. The plan is successful, at the cost of the remaining five hundred citizens and his own life.

At the climatic battle against Tiamat, he reappears as an Archer-class Servant and aid Fujimaru and Mash in defeating the Primordial Goddess.

Abilities
Because he is attempting to protect his back even more than when acting as the King of Heroes, his meagerness during combat has drastically increased. He fights with various Mystic Codes drawn from his treasury and a large axe.

Item Construction (Fake) (道具作成（偽）) is a skill to produce devices that carry magical power. Since he is not a magus, Gilgamesh originally would not possess this skill, but he has an ability equivalent to it due to the existence of Gate of Babylon. All tools that can be created (that can be retrieved from the Noble Phantasm) are “items inside the Babylonian treasure vault”.

Not only producing tools as a magus, he can even pull off the construction of buildings with his Territory Creation. To begin with, the citadel of Uruk was designed by Gilgamesh. There are limits to constructions of just clay and stone, but even as as he murmurs “Needs more lumber. Seems like I’ll have to go to the cedar forest...”, the king still doesn’t feel like going to the cedar forest due the matter with Enkidu having a lasting effect on him.

Gilgamesh's Charisma as a wise king, who was said to be the most outstanding king of all. He possesses an extremely high charismatic nature that is almost like magical power or a curse.

Sovereign of Magic Wands (魔杖の支配者) is the skill that denotes Gilgamesh’s way of being as a Caster that manipulates various mystic codes. Grants bonus to magecraft-type attacks. He will handle tools with care in case of fighting while being mindful about them. He was such a king.

He is shown to have proficiency in summoning, as he summons seven servants on his own and manages to resummon himself after death as an Archer. The servants he summoned are unique in that they only required Gilgamesh's mana to be summoned, and they then gather their own mana to stay in physical form by eating and sleeping like humans. They also survive by taking in mana from around them as it is abundant in Uruk due to being in ancient times.

Creation and Conception
Ginka is the character designer for Caster.