Next mission took you guys through the mountains to reach Area F, which was a frozen area. 

https://youtu.be/J1MYktq7Lhs

(Y/N): Well ... this place looks dead. 

Prairie then contacted you guys. 

Prairie: Can anyone read me? 

Aile: Loud and clear Prairie. 

Blake: What's going on? 

Prairie: There's a distress call coming somewhere nearby. 

Ruby: So, there are survivors out there? 

(Y/N): Could be. 

Weiss: If it's true, then we have to find them. 

Yang: Before Serpent's goons find them!

All of you guys took off, having to swim through water, and Aile had to break through ice, using Model F! 

Aile: MEGAMERGE!

Yang: Neat! What can that form do? 

Aile: Let's see. 

She charged up an attack and fired a fireball, which broke through ice! 

Aile: Okay, it shoots fire, and- 

She could freely manipulate the directions of her shots. 

Aile: That's good too! 

(Y/N): Good! 

Soon enough... 

The radio signal seemed to be getting close. 

(Y/N): HEY! ANYONE?! 

No answer. 

Ruby: WE'RE HERE TO SAVE YOU! 

Still no answer. 

Prairie: The source of the signal is definitely coming from near your position. The device emitting the signal should be close. Try to locate it.

Blake: Okay. 

Blake begins to listen for anything, and then hears- 

Blake: Hey, I think something is coming from this room. 

You guys get inside to find a terminal. 

Yang: So, nobody but a computer? 

Aile: Let's see. 

Aile turns it on. 

Aile: Hmm.... It looks like there's a data disk still in the terminal.

Ruby: What does it have? 

Aile plays what's on screen and out came a voice. 

Voice: I don't have much longer. I pray that this data doesn't fall into the wrong hands.

Images of Guardians and Serpent appear! 

(Y/N): IS THAT SERPENT?! 

Voice: The recon unit has unearthed a strange metal in this area. It seems... conscious. The commander called it "Biometal Model W." We continued to research it, until one day, when we were just about ready to give up... One of our own went mad and destroyed our unit. He erased the data and vanished with the Biometal. His name was Serpent, and he was always the most passionate about our research into the Model W fragment. I will attempt to record what little is known about the cause of his insanity below...

The playback ended there. 

Blake: So, Serpent was a member of the Guardians. 

Yang: Hey Prairie, did you catch that? 

Prairie: Sis... This is a report from the first commander's recon unit! The distress call must have been activated to make sure someone would find this data. But the recon unit is... gone. As for Serpent, there was nothing about that in the HQ database.

Aile: Slither Inc. might have the other half of the data. 

(Y/N): So, if we find the Pseudoroid, then we'll find the other half. 

Ruby: Then let's get to it! 

Soon... 

Entering an underwater area, you guys notice a small lure. 

Blake: Is that- 

(Y/N): It could be part of the Pseudoroid. 

The lure then spoke. 

Lure: Oh my! What's that disk you've got there? Agh! I thought I told you Mavericks to leave anything of importance to me! Hmph! Worthless fools!

Yang: Yep, definitely Pseudoroid. 

Weiss: Hey! Where's the other half of the data? 

Lurerre: Oh my my... You must be those horrid interlopers trying to stop poor Lord Serpent's plan. Well hmph! I'm not telling you anything, so how do you like that!? I am the lovely Pseudoroid Model L, Lurerre. I'm going to tear you apart piece by piece! 

Yang: Like that? You're just a lure! What are- Uh ... 

Lurerre showed her true body! 

Lurerre

(Y/N): OH CRAP! 

Lurerre: DIE!! 

https://youtu.be/42CO4L7zyBw

She began to bite and attack, as the main body also fired giant missiles, which Yang had to knock away! 

Weiss: DID YOU HAVE TO TAUNT HER?!

Yang: HOW WAS I SUPPOSED TO KNOW SHE WAS AN ANGLERFISH?! 

(Y/N): QUICK! WE NEED TO HIT HER WITH FLAME ATTACKS BEFORE- 

The lure then shot out ice beams and ice stalactites across the ground! 

Lurerre: HAHAHAHAHAHA! COME OUT LITTLE INSECTS!! 

(Y/N): Okay, I have an idea! Aile, can you redirect your shots to distract her? 

Aile: Wait ... hey! That could work! HEY! OVER HERE! 

She began to fire shots, which Lurerre dodged, only to- 

Lurerre: AGH! THAT HURT! HOW DID YOU- 

Yang then socked her! 

Lurerre: DIE YOU WORM! I'LL MAKE YOU PAY FOR THAT! 

The main body roared and tried to bite her, only for- 

(Y/N): GOT YOU! FIRAGA!

You fired a powerful fireball into her mouth! 

Lurerre: AAAAAAAAAAAAAAAAAAAAAAAGH! 

Weiss: Now's our chance! 

Lurerre had been stunned and everyone attacked and attacked leading to Aile bursting straight through Lurerre's body! 

Lurerre: Oh my... Oh my... Goodbye cruel world. How could this be! Beaten by runts like them! 

Lurerre then exploded! 

And the biometal was released. 

Model L

https://youtu.be/57Ib98IKDLM

Model L: I am the Biometal of the Ice, Model L. Thank you for freeing me from that awful body, heroes. You're looking for the rest of the data disk right? I'm sorry, but it has already been taken away somewhere. A hundred years have passed since the war, but it looks like some things will never change.

(Y/N): We need your help Model L. A maniac named Serpent is going to awaken Model W, and we have to stop him! 

Model L: Hmm... Model Z, I heard the story about Serpent. I know you were linked with a host body, but I heard he beat you in combat.

Model Z: Yes... My failure led to the death of a good man named Giro.

Yang: Yeah! Serpent and his two wormy minions did him in, and we're not going to let him get away with it! 

Model L: I see... Alright, I'll join you. It should be an interesting challenge to take on the one who bested the great Model Z. I'll give you my password, but the data is split into two halves. The other Pseudoroid with my power has the remaining half. I won't be able to give you the complete password until you defeat him.

With that, Model L joined the team!