Sewers, Fuyuki

1994

Two figures could be seen on the floor of the sewers currently bleeding out due to a surprise attack by servant assassin.

"My dear Ryuunosuke, as I Bluebeard wither away with you, the mental pollution I have accepted is cleared. This unfair life we villains share is one that we must not face alone!" Caster spoke softly viewing his beloved follower bleeding out alongside him.

"I understand now, the grail has spoken a truth to me I have not understood until now as we lay here forsaken by God and the world around us. Just like they took my dear sweet Jeanne away from me so too do those fiends take you away as well master, however I Gilles de Rais your humble teacher will not allow IT!" Caster yelled as he stared the serial killer in the eyes, a certain fondness could be viewed from his eyes.

Uryu, upon hearing his friend's words turned to him and grinned happily, appreciating the view of his lovely sanguine flowing freely out of him unto the ground like a beautiful canvas.

The young master giggled happily, uncaring of everything else around them "This truly is life! I was totally right! The vividness of life expressed like a beautiful work of art seen only in the final moment of life! HAHAHA! Its sooo~ COOOL!"

Gilles smiled at his master's enthusiasm; happy the grail could give him such an understanding master. His death was not to be however, for the Grail imparted him with a certain knowledge, "Savor this moment my dear disciple for it is not your time yet as I your humble caster offer you a contract."

'A contract?' The killer looked at bluebeard, waiting for him to continue his explanation.

"Yes! Gods divine inspiration as touched me so! I am not a true servant of the Grail and am merely allowed to be here on a whim, my existence fated to disappear as soon as this life is extinguished. But! This life is one I wish to grant you my friend so take up this contract and accept my powers as your own as I Gilles de Rais offer you!" Caster held his hand out as he began to deteriorate into spirit particles.

"AHAHAHAH YES, TAKE MY POWER SO YOU RYUUNOSUKE URYUU MAY LIVE ON AND CONTINUE TO SPREAD YOUR BEAUTIFUL PHILOSOPHY! MAY GOD SMILE UPON YOU AS YOU SPREAD ENTERTAINMENT FOR THE GOOD OF MANKIND!"

With hope to continue finding life's beautiful message he clasped his servant hand. "YOU'RE SO COOOOOL~!" Ryuunosuke laughed softly tears streaming down his face as the world erupted into a glorious golden light.

Shortly after the ritual Ryuunosuke decided to ditch the current Grail war in order to keep his promise to caster. "There was no longer a need to stay in a place were people were out to get you after all" he muttered as he traveled out of his workshop heading towards a certain house, just missing the arrival of Waver Velvet and his servant at his old hideout. The trek was long and gave him time to understand the emotional event which just transpired. The young killer also took some time to admire his new outfit courtesy of Caster, the purple ritualistic robes covered in sanguine designs and the beautiful spell book now in his possession. A Myriad of thoughts on how to use his now Noble Phantasm and unlocked magical circuits.

Upon arriving at the house in question, he was on autopilot ignoring the police tape around, walking until he registered the blood on the floor, making out a certain diagram. Looking around he searched for a few minutes until he found the item he was searching for. He grabbed his ancestors' book gently and smiled as he thought of that fateful night. The Night he summoned his cool teacher.

Reminiscing a bit, he decided to head home and searched his house for any other tomes filled with what he understood now (thanks to his gaining Gilles' knowledge) to be filled with information about his ancestors magecraft and the moonlit world. He vowed to learn more about this supernatural world and how he could use it to further enact his desires.

Unknown location,

Dec 2016

The demi-servant grinned joyfully at the message sent to him, the last few lines on the email response to his application filled him with excitement.

[…The application under Ryuunosuke Uryuu has been reviewed carefully, and we are proud to inform you that your application as a master candidate has been accepted. Further details will be sent shortly. We await your arrival.]

~ Olga Marie Animusphere – Director of Chaldea

This just came to me in the dead of night and I couldnt get it out of my head. Just a small idea of a FGO fic with an unused character.

I picture this as Ryuunosuke in FGO alongside Ritsuka going through singularities as foils, of death and life however both following the same goal of protecting humanity. Bonding with servants both "good" and "bad".

As it appears in the lore, Uryuu while a atypical psychopath does love life and would refuse to let it be extinguished.

Honestly i just want to show some throwaway characters some love, because a NP capable of infinite cannon fodder and regen, coupled with the ultimate monster, i think yes.

Lastly, in the span of 1994-2017 the young killer was learning magecraft and meditating between his ideals and those of Gilles, even the thoughts of god and life which will begin to change his character into something more complex I hope.

Meh just an idea.