I hope no one's started on this one, this took longer time than expected... Man, it's long.
Obligatory disclaimer about bad translation skills, Chinese being hard and English not my first language. Please excuse all the awkward sentences.
[spoiler=Characters]
Big sister Lucina and little brother Mark are ADORABLE
EDIT: The formatting... I can't seem to get it right.
Some notes, Mark refers to Lucina as Lucina-san, but Krom just casually as "dad", while Lucina drops any suffix on Mark but refers to her father very formally. Also "jerk" is very probably "baka".
[spoiler= C ]
Mark: Hah... Cleaning sure is tiring. Huh? This is...
Waah!
Lucina: Ah! That scream... Mark!? Could it be an enemy raid?
Mark! Are you okay!?
Mark: L-Lucina...!
Lucina: Calm down, Mark. Don't worry, I'm here to save you...!
Mark: B-bug!
Lucina: Huh, bug?
Mark: Yeah! It was this big and came out from nowhere, crawling in all directions...!
I-it almost scared me to death!
Lucina: That's the reason for the scream just now? And I thought it was a raid.
Really...Don't make such a big fuss over small matters like that.
Mark: Ah! It flew - ! Wait, it's coming towards us!
Lucina: Eh!? Eeeek!
Mark: S-see? I told you there was a bug! Lucina, get rid of it, please...!
Lucina: I-impossible! How can it be this huge...!
Mark: But you just said "Don't worry, I will save you", didn't you!?
If you leave one bug, they will dominate the lands! (I... am honestly not sure what he's saying, but it's not supposed to make sense anyway...)
Lucina: What kind of arbitrary reason is that?!
Mark, you're the one who aspires to become a tactician, just think of a tactic to deal with bugs, can't you?
Mark: There's no such tactic!
Lucina, you're my sister, please help me - !
Mom said so too, you have to protect your baby brother, right?
Lucina: Ah… She did say so. I understand... I'll do my best...
Mark: Yay! Thank you~! I expect no less of her highness, the future Queen of Iris!
Lucina:...Well aren't you wicked, your highness the Prince...?
Mark: But I don't remember anything. Oh, the bug went under hiding, now's our chance!
Lucina: It's too dark, I can't see anything.
Mark: Use the rays of the Falchion to light up. First confirm it's position, and then swipe the ground...
Lucina: Don't speak of the Falchion as if it was a bug-killing tool!
Mark: S-sorry...
Ahh! There it is again!
Lucina: Hng...! What a bothersome opponent... But I won't let you harm as much as a hair on Mark's head!
Mark: Lucina...!
Krom: Hey! You've been at it for a while, what is all this noise about!?
Lucina: F-Father!?
Mark: Dad!?
(…)
Krom: Geez, you two... Don't create such a racket over a bug.
Mark: It's my bad...
Lucina: I'm sorry, Father...
Krom: It's fine... just be aware from now on.
Mark: In the end, dad was the one who got rid of the bug. Dad sure is reliable ~
Lucina: Yes... but we gave Father trouble...
Mark: Hey, Lucina, are you feeling down? I'm actually really happy.
This is the first time we both got scolded by dad together.
Altogether I think it's nice to have memories like this I can cherish, it makes me so happy!
Lucina: Mark...
… Yes, you're right.
I do think it's kind of funny...
[spoiler= B ]
Lucina: ...Mark.
Mark: Mm...
Lucina: Do you know what I'm going to say?
Mark: "When you've finished slicing fruit, wash the Falchion before returning it to me", right?
Lucina: Wrong!
I was going to say, don't use the Falchion as a fruit knife!
Mark: Eek! I-I'm sorry!
Lucina: "Sorry" doesn't cut it!
This is the Royal treasure of Iris, as well as my memento of Father!
And yet you dare use it to slice fruit!
Ahhh...the scent of fruit on the Falchion doesn't suit a weapon...
Mark: When I wanted to slice fruit, I saw the Falchion in front of me...
And...besides, I... haven't touched that sword much...
I don't know how it feels to hold it in my hands.... so... I got a bit curious...
Lucina: …
Mark: You're... mad... aren't you.
Lucina: ...Mark, you've never touched this sword before?
Mark: Ah, that? Not much, really.
Usually you carry it by your side, and even if I have access to it, it's only when moving stuff.
Lucina: Then, you don't know if you have the ability to use the Falchion or not?
Mark: Eh? You need to have a special ability to use this sword?
Lucina: Yes... you don't remember, so you don't know...
The Falchion is an extraordinary treasure, it only lends its power to the ones of Holy blood and the inheritors of Naga's power.
It means that even if you have the blood of the Holy King, you don't necessarily have the ability to wield the Falchion.
Mark: So that's how it is... I've never wielded this sword, so it must mean that the future me doesn't have that kind of ability.
Lucina:...No, it could be that you have the ability. It's just that I've never let the future you attempt to wield it. In other words, whether you have the ability or not is still a mystery.
Mark: Oh!? Really!? If I could wield the Falchion too, how powerful I'd feel!
The genius tactician who holds the legendary sword... In that case, I could even surpass mom!
Lucina: Yes... The future me never thought of this. If you could wield it too, it'd be a good thing... In the event that I'd have an accident.
Mark: ...Huh? "An accident"?
What...do you mean by that...?
Lucina: I mean in case I perish in war.
If there was someone who could succeed the Falchion after my death, then our chances of winning the war would be better.
For the sake of ensuring the future, we need to take in account all the possibilities.
So, let's try and see if you have the ability to wield the Falchion.
Mark: …
Lucina: Mark?
Mark: … I can't do it.
WhenI think about it, I can't possibly have the power to wield such a powerful sword like this!
Lucina: You can't know if you don't try. Didn't you just say you wanted to use it? So...
Mark: …I said I don't want to!
I don't want to do this kind of training!
To train for the possibility that Lucina dies... it's ridiculous!
Lucina: …Mark. I understand how you feel, but you need to be prepared.
We have to win this war, no matter what methods...
Mark: I get it! I just... I'm not that prepared yet!
Lucina, are you going to go against mom's wishes? Our hardworking mom, who refuses to let a single ally die!
Lucina: Of course, I don't want anything like that to happen to me either.
… But, I also can't promise that I will always return alive.
Mark: That... What's that supposed to mean...!
If Lucina were to die, I'd still refuse to wield the Falchion!
Even if I have the ability, I would still only use it as a fruit knife!
Lucina is a jerk!
Lucina: M-Mark...
You just want to use it as a fruit knife, don't you...
[spoiler= A ]
Mark: Lucina.
Lucina: Mark, what's wrong? You look so serious.
Mark: That's... Please let me try to use the Falchion to see if I have the ability to wield it.
Lucina:Ah...! But Mark, not too long ago, you said you wouldn't use it.
What made you change your mind?
Mark:After that, I kept thinking about it.
What you said about war strategy...
"For the sake of ensuring the future, we need to take in account all the possibilities".
Since I want to become a tactician, I can't keep running away.
I need to be as prepared as you are, Lucina. So...please!
Lucina: I see... If that's how you feel, then I have no objections.
Let's prepare at once.
(…)
Lucina: Okay,Mark. Imagine that wooden log to be an enemy, and strike it.
If you don't have the ability, the Falchion will stay a blunt blade, leaving no mark on the log.
However, if you do have the ability... with the power invoked by the Falchion,there will be a clean cut right through the log.
Mark: …
Lucina: Okay, here's the Falchion.
Mark: Um.
Ah...I really am nervous! W-what if I do have the ability...
No,no! I said I'd be prepared!
… Alright!
Ha!
…
… Eh? I don't feel like I've hit anything...
Lucina:… The log is still whole.
That's really too bad, it seems you don't have the ability after all...
Mark: …
Lucina: A-ah, don't be discouraged, Mark. Even if you don't have the ability,you still have the blood of the Holy King in your veins, you are a true prince of Iris, that won't change.
Mark:… Hee hee! Ahaha!
Lucina: M-Mark!?
Mark: Hahaha...!This is hilarious. I got all nervous and worked up for this challenge, and in the end I couldn't even hit anything! Hehehe, ha ha ha!
Lucina:...Hnf, heehee. Really. Mark... Even I laughed...
Lately, the question of you having the ability or not has been bothering us both. But it resulted in our relationship becoming strained, as if we had a fight. With things like this, it'd be better if we were just making a fuss over a bug, like before.
Mark: But thanks to all this, I feel prepared now.
Because I can't feel hesitant just because I'm afraid of losing someone important.
Lucina, if you were to pass on before me... I would still fight until the end... and obtain victory.
But... all in all... I still don't want anyone to die...
Please let me protect you, Lucina. It's not an excuse to shirk my responsibilities, okay?
Lucina: … Mark...
… Alright. Earlier, I didn't promise that I'd keep myself alive, but I realize I was just running away too. Now, I promise. I promise you that I will certainly keep myself alive.
I won't leave you alone. And I certainly won't let you die.
Let's survive together until the end. We will achieve victory, and take back our future!
Mark: Lucina...! ...Uh-huh! It's a promise!
Lucina: Good. I promise.
… Oh! I almost forgot, today it's my turn to cook!
Sorry, I'll be going now.
Mark: Lucina! You forgot the Falchion! … She's already gone.
…Well, since I probably won't have this opportunity in a while, let's try another swipe with this then.
After all, I don't think I'll ever be using this sword on the battlefield.
Okay~ Hayah!
…
… Sure enough, there's not even a trace on the log.
… Hey, Falchion, you have to protect Lucina, or I won't forgive you!
If Lucina were to die, you'll stay a fruit knife for the rest of eternity.
… Just kidding. I guess I should go return it to it's rightful owner now.
(…)
Krom:… Huh? What happened to this log? Did someone practice on it?
… It's been elegantly cut in two...