Summoned to another world, Shirou Emiya a hero of justice, must now serve his new master Louise a prideful hot-headed Pinkett mage of the Tristain Academy of Magic as her familiar, to prove to others and herself that she isn't a failure of a "Zero."

Louise wanted to prove to everyone she was more than just the Zero. However, she needed help to accomplish that. Unknown to her, she would end up summoning someone who would do just that. Shirou Emiya Aozaki wished to be a hero, but his world discouraged such dreams. However, he was called to a world in need of a hero. Louise and Shirou, Master and Familiar, The Zero and the Forge.

Shirou had sacrificed his one wish to save his sister, and in his final moments against Angelia Ainsworth, Miyu wished for her brother to be saved. Now in a new world, Shirou has nothing left, and it is by chance he was found by a certain commoner family who runs an inn. Will the magus find the will to move on from his past? (Writing Contest Entry for Alex-kellar)

The world is a kaleidoscope of possibilities. One so complex and so vast it would be impossible to write every single tale. It may be because I only have so much time, or it may be because this one shines above the rest. It may even be simple favoritism, but the truth is that this tale has reached down to us. Hear, the tale of the Hand of Revelations. Louise summoned FGO Galahad

A King who lost everything connected to the fates of two young girls of great power, one of Void and one of the Root. A war is brewing and the King must defend his new master from elements of his past. (CW: Dark Themes and Graphic Violence)

A oneshot about isekai shirou in the familiar of zero world

(Pre-Canon FoZ) At the end of Heaven's Failure, Shirou found himself reincarnated in another world as a girl. Will she, once again strive to be a Hero? Or forge herself a new legend in this new land?

Louise wanted a beautiful, divine, powerful familiar. To her chagrin, she only got the "power" part and a crass voice in her head instead. Also why is Zerbst suddenly staring at her with that disturbing expression? (Yuri)

Okita hadn't the faintest idea where she was summoned to. But that was fine. It was fine if she didn't really get it. All she ever needed was a Master to serve and an enemy to kill.

Louise desired a familiar. Something strong and magical, something beautiful and wise, something that would show the whole world the kind of mage she could be. Four out of five is pretty good, right?

Louise summons Gilgamesh, King of Uruk, as her familiar. Gilgamesh finds himself in a garden that is not his own, with an ignorant girl as his summoner. Halkegenians, be prepared to meet the King of Heroes!

Louise Valliere was too tired from the constant and never-ending battle against Singularities to ensure the continued existence of mankind. She had done more than her fair sure of fighting and it was time for Chaldea to pay her back for the service she had provided. Her return to Halkeginia would mark a revolution that would change her homeland and the rest of the world.

Gray from Lord El Melloi II gets summoned by Louise and believing her to be an Albionesse Noble they start an adventure that will show them all of the sides of Halkegenia, the Bad and the Good, perhaps they will even know the secrets of the "Holy Founder of Halkegenia" and uncover the secrets that he left behind.

After getting dumped by his girlfriend, Rin Tohsaka, Shirou Emiya is summoned into another world as the familiar of Louise de la Valliere, a proud noble girl with trauma, insecurities and a terrible temper. Unable to turn away from someone who needs saving, Shirou resolves himself to save the girl before him, and possibly avoid his fate as a "Sword".

At the end of Heaven's Feel, the Reincarnated Shirou found himself in another world as a girl. (One-Shot)

One was a Mage that didn't have any affinity for the elements. The other - a killer who simply wanted to return home. Nothing tied them to each other, nor do they have any experiences they can both relate to. They had nothing in common. But, when you look deeper - they were both filled with desire. The Ripper answers the Mage's call,and the Mage answers through love.

After parting with Saber, Shirou goes on to become a Hero Of Justice. During his journey he meets Vivian and enters a contract to find a way to enter Avalon. Yet he gets summoned to a different world.

Thousands years ago Zelretch visited a world of magic where he has a lot of fun, so much fun that now the people call him the founder Brimir and damage the development of that world, now in the present time, instead to fix the situation himself he will send others to do it and have more fun looking at them.

His life was about to end yet he was content, what he was not expecting was that the universe had new plans for him. When Louise failed her familiar summoning spell and was at her lowest a flash of inspiration caused her to try something risky, and what she got was something that neither she nor her world could have ever been prepared for.

After a life-altering failure during the second year summoning ritual, Louise tries one last time alone and drags a certain blue-clad Lancer to her side.

Artoria had been crushed upon learning from Gaia that her beloved had been tricked into another contract and would never see her in Avalon. But Artoria would not let her beloved get away so easily. Reborn as the twin sister of Louise, Artoria Guinevere De La Valliere would have her scabbard again. Nobody would deny her. Not even Alaya. One-shot! Shirou/Artoria

Something has gone horribly wrong, after his battle with Angelica Shirou was sucked into a green portal that appeared out of nowhere. Thrown into a new world Shirou would have to find his own method to return home. Now if only he could get away from his annoying new 'master' and fellow summoned.

Fate kaleid Skuralot is summoned by Louise during her fight with Miyu, it ends as good like everyone might have guessed. Sakura is confused but she is gonna make sure to take "care" of everyone. (Rated M for allot and I mean allot of child murder and I guess. Also mention of Shinji forcing Sakura so be warned)

Archer is reborn in a completely different Universe where the age of Gods is eternal but still mingle among the mortals in the modern era. Adopted into a weird and loving family enjoying the moments he did not have in his previous life. Years pass by only to be pulled into a green portal along with his little brother Saito to a far off planet.

In one world, she summoned an ordinary teenage boy from Tokyo, Japan. In this world, she summoned someone she never thought to see in her life. A change in the story that will spiral out and change the world known as Halkagenia.