(I skipped the Jaune vs Huge Ass Ursa Fight because we all know what went down. Cardin was being a dick, Juane threw red sap at him, a huge ass Ursa appeared, and Jaune killed it, with a tiny bit of help from Pyrrha. End of story. Also, I'm really sorry if some events in RWBY are in the wrong order, since I've only seen part of it. So, apologies to all of you hardcore RWBY Fans).

Y/n

We were just making out way to the docks, since Weiss wanted to "greet" the students who were coming here for the Vytal Festival. I just kinda followed them, since I had nothing better to do. I mean, I would take a nap, but then Weiss would complain and lecture me, and I could only take so much. Anyways, as we got there, we spotted and interesting scene. There were two detectives, inspecting a White Fang robbery. We asked them what happened (which wasn't hard to figure out), and they explained. After that, Weiss said something about the White Fang that seemed to irritate Blake, but she let it go (unintentional pun! Aw yeah!) When we were finally at the docks, ANOTHER thing happened.

Sailor #1: Hey! Stop right there!

Sailor #2: Stop that no-good stoaway

???: Hey! A no-good stoaway would've gotten caught! I'm a great stoaway!

He climbed onto a lamp post, and just as one of detectives were telling at him, he threw a banana on his face, and ran. 'Heh. Good one kiddo.'

Yang: Well Weiss, there's your competition.

Weiss: Quick! After him!

We all ran after him. Well, more like team RWBY ran, and I just teleported to him.

Y/n: Heya.

???: Ah!

Y/n: Don't worry, I'm not gonna hurt ya. Just wanted to let you know that you did a good job throwing that banana at that guy.

Sun: Oh. Well, thanks! Name's Sun! Sun Wukong!

Y/n: Y/n L/n. Call me Sans if you want. Nice ta meetcha.

Sun: Alrighty then! Nice meeting you Sans! But if you don't mind, I gotta go somewhere.

Y/n: Alright then. See ya at Beacon.

Sun: Wha?! How did you--

But you already teleported back to team RWBY, who were still confused on where Sun went. Well, mainly Weiss. Who was... arguing with Blake.

Y/n: 'From her bow twitching, to her liking tuna A LOT, to her being irritated by Weiss' comment from earlier, to this. I knew it. She's a Cat Faunus. Pretty cute, if I do say so myself.' I thought.

The arguing between Weiss and Blake didn't end, even when we got to the dorm. I was getting annoyed by this, that I literally wanted to shout, which rarely happened. And you know what? That happened.

Y/n: WILL THE BOTH OF YOU PLEASE, SHUT UP!!! *Summons Gaster Blaster and fires it*

Weiss: ...

Blake: ...

Y/n: Now I know you two are mad, but you're teammates. Weiss, you're angry because your family has suffered from the dust robberies. And Blake, your angry because Weiss keeps on assuming that the White Fang are bad.

I sent Blake an 'I know what the real reason is' kinda look.

Y/n: But you two need to know that both sides have suffered enough casualties as is. And Weiss, you can't assume all Faunuses are bad, just because the White Fang are made up entirely of Faunus.

Weiss: Oh please, what would you know of what I've been through?!

This... This made me pissed off even more, but somehow, I remained calm. 'Guess it's time to show them.' I removed my bandana mask, and looked at her with a sad look.

Y/n: I know what it feels like, because I lost my whole entire race to them. The people who I thought of like family, and my brother, were slaughtered with the rest. Me? I'm the only one left.

They were all shocked by my confession. Blake looked down in shame, and Weiss looked like she regretted everything she's said to me, but then looked at me suspiciously.

Y/n: And even after all that, I still believe that not all Faunuses aren't bad, since they're all being mislead.

Blake went from shameful, to shocked, and then have me a heartful smile, because I didn't hate all Faunuses, even after what happened to me.

Weiss: But, what do you mean you're the last of your kind.

Y/n: 'Shit. Can't hide it forever. Oh well.' How can I put this down gently... I'm a... monster. The good kind though. You see, my kind is full of compassion, and kindness. But we went to war with humans over the land. Eventually, the humans won, and they sealed us in the underground with magic. But then, a human came down, and freed us all.

Weiss: So that's it then. You're a monster. I don't care, but what really bothers me is that you said your kind was "full of compassion and kindness", and yet, you all went to war with humans.

Y/n: That's because they provoked us first, saying that us "inferior beings" should not belong on the surface, and go to the underground, where we truly belong.

Weiss: I still don't think that's the true story.

Y/n: Weiss, I'm telling you the truth.

Weiss: Then why this sudden confession? Why tell us now?

Y/n: Well, that's because I wanted to keep it a secret.

Weiss: Oh really?

Y/n: ... fine, if you won't believe me, then I guess the Schnee family are even more blind to the truth than lies.

Weiss: Why you-- Then I guess your kind was really weak for all of them to get killed!

I knew she yelled in frustration. I knew that.

But....

Then something inside me snapped. Something that I haven't felt in a long time reappeared. Anger, hatred, and despair...

I started to laugh maniacally, while crying. My left eye had then become red, with a cyan pupil, instead of the usual blue.

Y/n: Heh. Haha. HAHAHA! HAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHA!!!!

Everyone in the room became worried of what was happening to me.

Blake: Y-Y/n? Are you okay?

Ruby: What's happening to Y/n?

Yang: I don't know, but it can't be good...

Weiss: ...

Dust Y/n: *Looks at Weiss* So, you say my kind was killed because they were weak? Then I guess it's true after all. In this world... IT'S EITHER KILL, OR BE KILLED!!! *Throws Weiss out the window, and then teleportes to her.*

Weiss: *Summons a Glyph to slow her fall, lands, and then turns to you* Wait Y/n! I'm sorry for saying that! It was out of frustration! I didn't mean to say that!

Y/n: What are you talking about? This is no longer the Y/n you once knew. Allow me to introduce myself. I am Dust Y/n. The dark and insane side of Y/n. You see, talking bad about his race, or family, especially his brother, will set him off. You, did just that bringing me out. And, his emotions seem to be unstable, thanks to you. So, as a reward... *smiles insanely* I'LL KILL YOU!

No one POV

Just as Dust Y/n was about to attack Weiss, the rest of team RWBY came, and shielded her.

Ruby: Y/n, stop, please!

Blake: This isn't you at all!

Dust Y/n: Your right. This isn't me at all. But, you can never take back what you've done.

Yang: Y/n, please! We're begging you!

Y/n: That's what my brother did too when we were captured by humans. He was also being nice, saying that they could change their ways, and be friends. And yet, they killed him. Oh, did Y/n not mention that yet?

All of them were speechless. Seeing as they couldn't change Y/n back with words, they decided they had to change him back forcefully. Then, Ozpin arrived out of nowhere.

Ozpin: I think that has gone far enough. Dust Y/n, I suggest you release your possession of Y/n.

Dust Y/n: Oh I'm not controlling him. Just as I've said earlier, the only reason why I came out was because he snapped. So, until he calms down, or the person who has made his emotions unstable dies, I can't do that. But now that you're here, things will get problematic. So if you'll excuse me, I'll be away...

Dust Y/n teleportes away, leaving team RWBY and Ozpin alone.

Weiss: What have I done?

This time, Blake snapped.

Blake: What you've done is that you caused Y/n to go insane, talking about his kind like that! Did you not notice how hard it was for him to talk about it? Or were you being ignorant like the rich girl you are!

Weiss looked down, ashamed of what she had done to you mentally and emotionally.

Weiss: 'Y/n... I'm so sorry.'

-To be continued-

(Surprised huh? Well, a main character sometimes has to have a dark side, so I decided that Dusttale Sans would do the job, since his backstory and the AU are both pretty sad. Anyways, where did Dust Y/n go? No one will know until the next story part. This is ZEFFEX, signing off! Later!)