*10 years later*
Team RWBY POV
Ruby: you are asking to meet us?

Professor Ozpin: Yes, there will be a mission for you. As of you know recently there are giant monster attacking White Fang. We do not know of their origin, but every time they appear, this girl is seen on the scene.

Blake: so you wish us to capture her?

Professor Ozpin: only talk to her, see if she's responsible for the destruction.
Weiss: understand
Yang: got it

Professor Ozpin: I wish you luck
Yuki Suzume/Belial POV
It's been 10 years, I learn to fuse and summon Kaiju, even some Dark Ultra, I been attacking White Fang Scum across remnant, and apparently Belial is a Alien. I am currently in a forest cliffs, stalking a White Fang Base below, thinking about which Kaiju to use.
Belial: There is a airship just landed near us.
Yuki: I know
Belial: which one will you use?
Yuki: Pedanium Zetton
Belial: good choice
??? Red/Ruby: hey, you, stop.
Yuki then took out two capsules, King Joe and Zetton

Yuki: why should I? They're nothing but criminal scum.
??? White/Weiss: Wait, stop

[There should be a GIF or video here. Update the app now to see it.]

(Replace The guy with Yuki)
Yuki then transform into Pedanium Zetton, the 65 m Kaiju look at the group/Team RWBY before turn around and fire Dest Ray Buster (デスト・レイバスター Desuto Rei Basutā): A red-colored laser that is shot from his head, based on King Joe's Dest Ray/Eldritch Shot.

The ray destroyed 60% of the base before it fire Pedanium Flare (ペダニウム・フレア Pedaniumu Furea): Pedanium Zetton first creates an energy circle in front of its body before firing a fiery electrical energy beam from its hands. This attack is analogous to King Joe's Separative Eldritch Shot and Zetton's Zetton Breaker. It destroyed remain of the base.

The remain survivor try to run away, but Yuki then does a Energy Punch: A punch attack covered with dark red energy. This attack might be inherited from Yuki or Belial themself. It crushed the survivors before it turn to look at the group/Team RWBY before walk away.

Team RWBY POV
Weiss: I think we found our giant monster...
They look at the carnage as the monster/girl walk away before they leave themselves
Ruby: come on we need to report back to professor Ozpin, we can't fight her yet.

Yeager-326: well, what do think? I'll try to update daily, but for now...Ciaos~