|Appears in:||Fate/strange fake|
|Character type:||Servant (Master: Police Chief)|
Caster's identity is not stated within the story, but he bears the most resemblance to Alexandre Dumas due to his reaction to rumors of plagiarizing stories and having rewritten them to his own taste.
While Caster doesn't consider himself to be a Hero, he doesn't mind being worshipped as one, and instead states that it is his job to create Heroes. He has no interest in the Holy Grail because he doesn't have a wish that would require its power. He doesn't care how the War will develop, what kind of conclusion will result, or anything about it. He simply wants to act as an observer there to spectate, and he will be content with his role in the Police Chief's plan while enjoying good food and beautiful women.
He is an extremely boisterous man who likes to indulge in pleasure and speaks with vigor while segueing from one topic to another without pause. He likes to make extravagantly blatant lies, such as having slept with Cleopatra VII and Yang Guifei in his resting place and the ability to produce one thousand babies from one hundred women. The Police Chief pays them no heed, and simply tries to get him back to work.
He doesn't like the constant work forced upon him, causing him to complain to his Master over the phone to get him a woman from a TV advertisement. He is quite taken with both the internet and television, and he likes to tell the Police Chief about what he has seen during his ramblings. He likes to call his his Master "Bro" because he says they vowed to be brothers over a ‘bonding drink’ due to seeing that Asians love using word on the Internet.
He doesn't like having his power compared to rearranging and rewriting old stories. He thinks that his forgeries cause a commotion, so to say something like "compared to the Original, my creations are more interesting" is a bad joke to him. He goes on a tirade, telling his Master to go die in a ditch, write a script of his hollow praise, read it to his wife, who will be in Caster's bed, and to give him the script beforehand because he is better at editing bad scripts than legends.
Caster is a "tamed magus" used solely as part of the Police Chief's plan to win the Holy Grail War rather than a direct participant. He calls his Master during a meeting to discuss their failed plans at keeping complete observation over the Holy Grail War, and begins by asking for a prostitute. He changes topics several times in a brief moment, while also complaining about his workload. Discussing the merits of his abilities drives him into a frenzy, causing his Master to hang up on him during a long insult to continue with his meeting. Utilizing Caster's power, his Master plans on shaking the very foundation of the Holy Grail War by planning "to defeat Heroic Spirits with the power of humans." The conclusion that awaits them is unknown, as the man summoned as Caster still has yet to finish this story.
Caster is extremely weak compared to those who far surpass humanity, and his Master states even he could easily defeat Caster. He was not chosen for his strength, but rather for his special ability, Sublimation (昇華, ?). The skill involves somehow rearranging and rewriting the legends of Noble Phantasms and bringing them into existence. He compares it creating pure forgeries of the weapons, saying that it is outside of his forte and instead recommending Elmyr de Hory as someone he believes capable of producing an infinite number of forgeries with powerful magecraft.
Their actual nature is quite different, as he is capable of giving birth to legends that are even greater than the Originals and making them real. He has created at least thirty weapons with powers that are greater than what were told in legends, and the process is seemingly time consuming because he thinks he'll be driven crazy from overwork. His Master sees this as vital in defeating Gilgamesh due to mere forgeries not being enough to overpower the King of Heroes. He wishes to utilize his team to quickly overpower him with the enhanced Noble Phantasms before he can draw Ea.