Illyas pov

illya was currently with her dad. her brother jaune was asleep. she saw him looking at him with a serious and scary look. she knew that this was serious and that he only gave that look when someone's life can be in danger.

illya I've called you here to tell you something important that you will not repeat jaune. right now as you know the church is preparing for the holy grail war. i have told you and jaune about the truth about the grail how it was corrupted but after i killed your grandfather i found out that is was the einzberns themselves who corrupted it in the 3 holy grail war they summoned a villager who was embodiment of all evil however he was a villager so he couldn't fight and died however since he wasn't an heroic spirit he didn't return to throne of heroes but went into the grail itself when he lost corrupting it. making it evil kiritsugu says

i know father illya was bout say something else but was cut of by kiritsugu.

Don't interrupt me illya the reason why i met you in private rather then say it in front of jaune is because we don't know what will happen if the grail chooses a master from another world. so i want you to gather jaunes friends the tohsaka and matou girl at the einzberns family castle kiritsugu says.

illya understood she too feared for her dear onii chans life so she agreed.

timeskip the next day

Jaune me and dad are going to visit the einzbern castle so we can grieve for mummy illya says hugging jaune.

Are you sure you don't want me to come jaunes as he hugged her back he wanted to find a way to bring back irisviel since his dad and sister really missed her a lot and he wants to meet his mother not by blood but by family connections.

That's not necessary jaune the einzberns as much as I don't like there view had a script policy that only family members by blood or marriage that the dead person knew would go and grieve kiritsugu says making up an excuse so that they can meet rin and sakura without jaune being there so he can explain they're plan to them.

the two then arrived at the einzbern castle as the sat down waiting for rin. eventually the two arrived and illya went down to greet them

hey sakura rin have you been thinking of my onii Chan when am i gonna be an aunt illya says teasing them making the 2 girls blush it wasn't unknown to all that rin and sakura both wanted jaune.

shut it little devil now why did you two ask for use to come here. rin says.

Its about jaune im gonna explain his past you 3 kiritsugu says walking downstairs.

what past rin says.

take a seat it will be long and would be unbelievable if we didnt know about the third magic. kiritsugu says as he explains jaunes past all about remnant. al about how he thinks the zelretch brang him and fused his soul with a version of arthur.

why do you think that rins says as she was angry hearing about the betrayal her jaune i mean her friend faced. she vowed that if they ever returned to remnant that beacon will suffer they're wrath.

you all know the legend about king Arthur's scabbard said to make him undefeatable and immortal. it was only when he somehow lost the scabbard that he fell. well in the fires i implanted it into jaune and without me forming a pact between jaune and saber he starter to heal but it wasn't normal healing it was instant like in the legends

His abilities as you can see by checking his stats are all high infact they're on part with the servant class saber artoria pendragon from our world who was king arthur my former servants he also has a magical core aswell as circuts only a few legendary figures are said to possess a magic core one of them was saber. kiritsugu says.

well i cant argue with that sakura said.

it doesnt matter onii chan is still onii chan illya says as both me and rin agreed.

so onto the true reason why i told you this i need your help to destriy the grail but we cant let jaune in on this we dont know how the grail would react to master from another world kiritsugu says.

your predictions are correct emiya san very well i will help you destroy the grail so tell jaune i will moving into the tohsaka house for a bit rin says

well dad i already agreed to help dad illya says.

im in too i will protect jaune sempai and save the world because sempai wanted to so so do i sakura says.

after that the illya played with sakura and rin until the two left.

now then illya i found the relic that old man acth was going to have you use for the summoning it belonged to Hercules and you should summon him in berserker class.

ok dad illya says.

illya was standing infront of a magic circle as she walked up and puts out her hand generating mana

Silver and iron to the origin. Gem and the archduke of contracts to the cornerstone.

The ancestor is my great master Schweinorg.

The alighted wind becomes a wall. The gates in the four directions close, coming from the crown, the three-forked road that leads to the kingdom circulate.

Shut (fill).

Shut (fill).

Shut (fill).

Shut (fill).

Shut (fill).

Repeat every five times.

Simply, shatter once filled.

――――I announce.

Your self is under me, my fate(doom) is in your sword.

In accordance with the approach of the Holy Grail, if you abide by this feeling, this reason, then answer.

Here is my oath. I am the one who becomes all the good of the world of the dead, I am the one who lays out all the evil of the world of the dead.

You, seven heavens clad in three words of power, arrive from the ring of deterrence, O keeper of the balance ―――！

A boom was heard and standing before illya was a giant man that looked like he ate mountains and wrestled with dragons.

so your my servant berserker illya says using her thousands of magical circuits to control him but he roared at her.

it seams he doesn't want to obey we have some time before the war begins. kiritsugu says.

after a bit illya walked out of the houise alone thinking about why berserker wont obey her. she was then surrounded by wolves who started to bite her.

help me someone help me is this how im going to die. she thought.

without destroying the grail without protecting my onii chan. illya says.

Berserker pov

oh great another this time a kid as a master i wonder why she wants to use that corrupted piece of trash any ways. I had to work hard to get where i am and this spoiled new generation to weak to work for something they have use wishes i wont obey any of these ungrateful spoiled berserker was about to continue before he got visions of what was happening to illya.

help me someone help me is this how i am going to die without destroying the grail without protecting my onii chan.  my master illya screams.

so she want to help her brother she want to destroy the grail could she be the one. I've decided to help you master don't let me down show me the new generation can be changed berserkers says before with a roar he jumps out of the castle leaving a shocked kiritsugu who dropped his food.

Berserker then arrived where illya was before he sliced all of the wolves. illya latched onto him. 

thank you i understand now you weren't being disobedient but show that you wanted an understanding master that wont force her will on you imp sorry please help destroy the grail and help my onii chan illya says.

Hercules seeing this young girl began to develop brotherly instinct he want to protect and not make cry ever anyone who would make her cry would feel the wrath of the demigod Hercules.

Time skip a few days of training. over the last few days illya had been training with her dad the einzbern castle rin and sakura came over to train with they're servants and to plan on destroying the grail. they also visited jaune who they told that they were bust for the next month

time skip

illya was walking to the emiya house hold when she heard some noise like a fight she rushed there with berserker and saw rin and sakura on the way when they reached they saw a fleeing figure they couldn't get good look to see who it was. when they went they were shocked.

big brother how illya yelled