3rd Person Pov

The following day, Y/N had to go to the nearby church to meet with the priest and his servant as they too are also taking part in the holy grail war

Shirou: I've expected you, Y/N Emiya Von Einzbern. I am Shirou Kotomine, nice to meet you

Shriou tries to give Y/N a hand shake but Y/N just slaps away his hand

You: Don't touch me, I have no reason to be allies with an old enemy, especially, one of Kirei Kotomine's lackeys

Shirou: So you know of my father? Hehe, well, of course you do. First of all, the servant?

You: Yours first, I don't trust you

Shirou: Very well, Semiramis, come out

Semiramis: Nice to meet you. Assassin class servant

Shirou: Just as promised. Now, your servant?

You: (Liar, you have more than one) Fine, if you're afraid, you should have came out and say it.

Shirou: Hm?

You: Come out.

Shirou: Oh my, not only do you possess the Warrior Gilgamesh, you also have Jeanne D'Arc and the Pendragons too

Tamamo: Y/N-Sama, something feels wrong about this place, I can even smell it

Semiramis: To think this war would have 2 Mordred Pendragons

You: If that's all, we'll be leaving, I won't share nor want information from YOU.

Shirou: Alright alright, calm down, were allies, aren't we? If you don't want to share information, it's your loss (He didn't bring the Ruler Jeanne. Then that means she should back at his place)

You: Burn in hell you heretic.

Jalter: (In front of the one conducting the war, the priest and our ally, this is really getting interesting.)

As they left, only Jalter stayed in her physical form and not turn invisible

Jalter: I must say, that was bold of you to even call our ally a heretic even though he was the one helping us

You: As long as he has the same goals as his father, I won't trust him until I kill him. Kotomine, that family killed my mother. Sweet and innocent I may look, but I can get angry if I want to

Jalter: Hmph, it was also smart of you to leave Jeanne behind as well, who knows what would have happened if you brought her to the church

You: Yes, the Ruler Class takes care of every Grail War

???: And you were lucky to not trust

You: I'm sorry, and you are?

Caren: Caren Hortensia, a Psychic and I think I can be of use for you against Shriou, Y/N Emiya Von Einzbern

You: Speak.

Caren: My role is to take Spiritual Damage. That's my role. To take spiritual damage. That's the shortest path to identifying the demons. Demons are not visible to the human eye, it isn't known that someone is possessed until they transform.

You: Well, you are a psychic.

Caren: I am also the daughter of Kirei Kotomine. However, I do not have any connection to that man anymore.

You: ...

Ishtar: Should we trust her?

You: I'm a little conflicted here. Well, how
about you, Tamamo?

Tamamo: I can't smell any lies within her, meaning she's telling the truth

You: ... Fine. If she betrays us, I won't hesitate to kill her

Caren: I see, then allow me to be your ally. If I betray you, I don't have any complaints for you to kill me

You: Alright then. For now, let's go back, Gray and Jeanne are waiting for us.

Time skip

As Y/N and the other Servants returned, Caren was introduced to Jeanne and Gray. As for Y/N, he picked up a pole

You: Trace on!

A spell that Y/N learned from Kiritsugu as he hardens the components of the metal pole.

Gray: Y/N... are you here?

You: G-Gray?! What are you doing here?

Gray: I was curious on why you left. If my presence disturbs you... I'll go

You: No wait! Stay, Lord El Melloi II told me to take care of you and teach magic so come in, I won't bite

Gray: Okay... what spell are you practicing?

You: Right now? A projection spell, Trace On. Watch. Trace on. Judging the concept of creation.... Hypothesizing the basic structure.... Duplicating the composition material.... Imitating the skill of its making.... Sympathizing with the experience of its growth... Reproducing the accumulated years.
Excelling every manufacturing process.

Y/N drops the pole as he creates another, surprising Gray

You: See?

Gray: Amazing! However... I don't quite actually get it... sorry, I'm quite dumb in many things...

You: Don't worry, you'll get it soon. You were born and raised inside a village, so of course I understand.

Gray: T-Thank you... Y/N... what Sir El Melloi is really true, you are a kind soul

You: Hehe. Don't worry, soon, you'll take that hood off for me to see that face of yours

Gray: We'll see...

Time skip

That following night, Y/N felt weird, as if another person who looks and acts like him was close by. He got a message from Shirou saying that the Berserker of Red went rouge and this was Y/N's chance to find what he was feeling. He followed the aura and the energy as it lead him to the enemy's castle.

You: Skadi, can you get me up there?

Skadi: No need to tell me twice.

Skadi teleports Y/N onto the castle as he sees a boy, not too strong, but enough to even crawl. He even looked like Y/N.

You: Who are you?

???: Me? ... I don't know... I was just told that I am a homunculus...

You: With that body, you'll die in 3 years

???: I know that. I just want to do something with my life...

You: Then come with us

Skadi/???: What?

You: If you want to live a good 3 years, then come with us. From now on, your name will be Sieg.

Sieg: Sieg... I like that name. Thank you, other me

You: Call me Y/N. Now, let's-

???: Yahoo! Come on, we're- Huh? Who are you two?!

You: Shit, we've come to late!

Astolfo: Wait! Wait! I'm trying to help this guy escape! If the both of you are here to help then I won't fight. I am Astolfo, one of the 12 heroes of my time!

Skadi: For an Hero, you're quite good looking

You: Uh hate to break to you, Skadi, but Astolfo is a guy. Those female looks may be deceiving

Skadi: What?!

Astolfo: Ding dong!~ Yes I am a guy. Come on, we're escaping! I know the place inside and out so follow me!

Y/N carries Sieg as they ran out of the castle. By the time they did, Y/N spots Siegfried and another servant, Frankenstein.

You: Skadi, bring Sieg with you and follow Astolfo, I'll need to do something

Skadi: You're going to do something stupid again, aren't you?

You: You know me!

Skadi sighs as she and Astolfo run for it. Y/N equips Diarmuid's spear and his sword as he takes Siegfried's sword away by slashing it out of his hand

You: This isn't a battle that you want to win using Balmug, right, Siegfried?

Siegfried: Who are you?

You: I am Sieg, from the Silver Faction! I am not with the red or the black, I fight my own battles!

Rider: What a party pooper, hey, if you're not going to fight, just-

Y/N slashed the Rider using Diarmuid's cursed spear as the said Rider stepped back

You; Siegfried, retreat.

Siegfried: Thank you... Sieg.

Siegfried disappeared as Frankenstein was shocked a little. She growled for a bit as Y/N looks at her

You: Take care of the Archer above, I'll take care of this lancer.

Frankenstein nodded as she goes to find the Archer as Y/N distracts the Rider

Rider of Red: To think you're going to fight me. Alright then, Rider versus Lancer, let's do this

You: Sorry to burst your bubble man, but I'm no Lancer, nor a servant

The rider of red then attacks Y/N with bis spear but Y/N was one step ahead of him. The rider wasn't fast nor slow, but it was slower than Scathach and Ereshkigal, so he had the upper hand. What's more is that Diarmuid's Cursed Spear stops healing

You: To think the Legendary Achilles was such a disappointment

Achilles: You know my name?!

You: By your armour and the way you fight, it was obvious. However, the Archer in Black still has his arrows pointed at you

Y/N dodges the arrows as they immediately went for Achilles. The Rider servant had enough as he called on his chariot before retreating

You: That's it? Fine by me. Now to get to Astolfo and Sieg

When Y/N arrived, he saw Skadi and Astolfo protecting Sieg as Y/N joins the fight

You: I knew this wouldn't be easy! Hey, Sieg, if you want to make your mark, do something meaningful! It won't happen immediately or later, give it time!

Sieg: I understand!

You: Good! Now watch this! Gae Bolg, Alternative!

Y/N threw Diarmuid's spear as it splits into many parts, destroying all the golems. However, things weren't looking up as Siegfried came in with his master

You: Skadi, get Sieg out of here! Jeanne is nearby, go!

Skadi: Hai! Let's go, little boy

Skadi takes Sieg's hand as they ran away. They managed to find Jeanne who was collecting mysterious rocks from golems. As for Astolfo and Y/N, they were pushed back.

Siegfried: Why save him?

You: Can't a hero save someone?! Even if he's a homunculus, he still has meaning! For once in your life, Siegfried, stop being a weapon for everyone and start being a hero!!

Siegfried was shocked as he steps back. He remembers that he too wants to save people but it didn't go as planned. With Sieg and Skadi, they managed to make it through

Siegfried: Lancer of- No, I remember your name, we are partners. You and I, Y/N Emiya Von Einzbern. You taught me how to be a hero and you did it again. So now... it's my turn to repay that debt

Siegfried hold Y/N's hands as he fuses with him, once again. Siegfried was always and will be Y/N's soul and heart

Astolfo: But why?!

Siegfried: Ever since Y/N was born, I was within Y/N's soul, joined together to become one. When I was summoned, I felt as if something was missing and I was right. My wish now... is that you, Y/N, take care of that Homunculus.

You: I will

Siegfried smiles before disappearing as Skadi, Sieg and Jeanne saw it

Jeanne: So you've... got your other half back?

You: Yes. Our next mission now is not to be part of the red or black, we're the silver and the long term journey is to give this boy a life he can look back on