Disclaimer: The reason why this prompt insn't in the other Prompt thing I made is cause I used the Abridged version of UBW there, which aside from being a parody(with only five episodes rip) follows mostly the same exact story as the anime, with the inclusion of Actually Satan and Baeber, of course.
FFXIV X Fate/ Stay Night Unlimited Blade Works
When Medea of Colchis decided to use a Wraith in order to summon a Servent capable of protecting Ryuudou temple, She'd been hoping for an obediant assassin, prefferably one of the Hassan.
Instead, what she gets is a warrior comparible to the likes of Cu Chulaine and Herakles, with the most paradoxical of outlooks on life, being both far to naive to have the mindset of an Assassin and yet, far too cynical to be anything other than an Anti-Hero.
The Wraith in question knows only one thing. For as long as he is forced to emulate the Warrior of Light, he will do everything in his power to make sure that Hyedaelyn's champion is not forgotten, that all of his triumphs and failures are forever etched within the throne of hero's, that those who would look upon his life's works could see that he had made the ultimate sacrifice in order to insure that those who came after the Ascians could live, unburdoned by their predecessors mistakes.