We see Kai, Felicity, Leela & Fetch (the hyena) walking with BOS (Brotherhood of Steel) steven & his recon team, but unlike Steven & his recon team, Kai & his friends were tired from all the walking as Fetch collapsed on the ground and whined tiringly

Felicity: Fetch!

Felicity immediately kneeled down to comfort her hyena.

Felicity: it's okay.

Leela: (tired) how long until we arrive at this.... the fuck was it called again, Steven?

BOS Steven: it's called the Citadel.

Brotherhood Knight: and to answer your question, miss....

he pointed at a building, the Brotherhood of Steel HQ of the Capital Wasteland....the Citadel, formerly known as the Pentagon

Kai: (wide eyes) woah...

Felicity: (in disbelief) Holy Fuck, dude.

Leela: ....my God.

Steven: yeah, I figured that's how you three would react. Now come on.

he said as his recon team approach the citadel door as they stopped at door to let the other side know that they've arrived as Steven pressed a call button on the door

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and then after a few seconds, a brotherhood soldier named ''Cable'' spoke through the entrance speaker

Cable: who is this?

Steven: It's me, Cable. It's Steven. Me and my team are back with the ones that saved us from the Super Mutants from earlier.

Cable: (shocked) Oh right, sorry. I'll let you and the others in now.

and then, the Citadel's doors opened, allowing everyone to go inside as Kai & his friends see many Brotherhood soldiers practicing in the shooting ranges, doing exercises such as jumping jacks, push-ups, etc...

Felicity: holy shit!

Steven then stared at her and turned to Kai & Leela

Steven: (raises eyebrow) does she say stuff like that all the time?

Leela: she's just like that.

Kai: changing the topic, why is the city a barren wasteland?

after asking that question, every brotherhood soldier & recruit stopped what they were doing and just stare at them in disbelief, even Steven was silent at the fact that, since Kai & his friends are from another reality, they don't even know about why this Earth is a wasteland to begin with

Steven: (cringes).... right, i knew i was forgetting something to tell you. (sighs) ... I think I should take the three of you to Elder Lyons, he'll tell you everything.

Felicity and Leela: Elder who?

Steven: Elder Owen Lyons, he's our leader in this division of the Brotherhood. just follow us, okay?

he said as he and his team lead the way while Kai & his friends shrug their shoulders and follow them

(UNDERGROUND OF THE CITADEL)

we see Steven, his team, Kai & his friends walking down the halls of the Citadel while everyone of the soldiers was just staring at them in shock & curiosity

then they entered Elder Lyon's room, where they see an Old man with a beard and wearing an outfit that looks like a coat or something. This old man is Elder Owen Lyons

Elder Lyons: ah, Steven. i see that you've returned. (notices Kai & friends) even with these people you encountered and saved you & your team's lives.

Felicity: well, my pet hyena Fetch found the grenades.

She said as she pet her hyena, then Elder Lyons approached Fetch and patted it's head and Fetch seemed to enjoy the pat

Elder Lyons: well, I thank your pet for finding them. Also, what are your names?

Felicity: I'm Felicity, that's my pet hyena Fetch.

Kai: my name is Kai. Kai Johnson.

Leela: Leela's the name. Don't wear it out.

Elder Lyons chuckled in delight, then Steven whispered something important in his ear, which made his eyes widen and stare at him

Elder Lyons: you didn't tell them yet?

Steven shook his head and they both stare at Kai & the girls

Kai: tell us what?

Steven & Elder Lyons stare at each other with cringed looks

(ONE EXPLANATION LATER)

After Elder Lyons told Kai & his friends about how the Earth became an apocalyptic wasteland since over 200 years ago when the bombs fell, Kai & the girls were horrified at knowing that as Leela was covering her mouth in horror, Felicity almost fainted but she was strong enough to not faint

But as for Kai, he was frozen in shock at knowing this history lesson about the wasteland

Kai: i can't believe it.

Felicity: so... everything here is destroyed.

Steven: yeah.

Leela: and it's been that way for over 200 years?!

Elder Lyons nodded in answering her question

Kai: Do you even know who dropped the bombs and created this apocalyptic hellscape?!

Steven & Elder Lyons shook their heads

Elder Lyons: sadly, no we don't.

Steven: apparently, no one knows who dropped them and created the wasteland.

Leela: how did everyone even deal with it at first?

Steven: believe me, I don't know how everyone was able to deal with it. But it is what it is now, we can't change the past.

Elder Lyons nods in agreement

Kai: anyways Steven, what's the symbol on your armor for, exactly?

Steven: it's the symbol of our faction, the Brotherhood of Steel. The Brotherhood began 200 years ago by it's founder, Roger Maxson.

Elder Lyons: The Brotherhood's core purpose is to preserve advanced technology and regulate its usage and we believe that the technology can't be trusted by anyone who'll use the tech with the means to destroy humanity and start another apocalypse.

Leela: wow.

Kai: huh, your brotherhood sounds very cool.

Then a question popped in Felicity's head and stared at Steven

Felicity: Steven, back with your recon team, what kind of armor were they wearing?

Steven: T-60 Power Armor. As for how it works, it's powered by a fusion core. All our Power Armor has them. (blinks in confusion) wait, why do you ask?

Felicity: because I happen to know a lot about things technology related. And I honestly want to at least see how it works, that way I can repair it whenever it's damaged or something, that's all.

Leela: yeah, Felicity has a hobby of building animatronic replicas of FNAF characters.

Kai: She does it every other day.

Felicity: (crosses arms & smirks) it's true.

Steven: (smirks & nods) impressive. (mutters) I'm just glad that an Enclave Patrol didn't find you three.

But unknown to Steven, Felicity & her friends heard what Steven said under his breath and were puzzled at not knowing what an Enclave even is

Felicity: an Enclave patrol?

(RECORD SCRATCH)!!!!!!

Steven widened his eyes and stared at Elder Lyons, who sighed and gestured him to tell Kai & his friends about the Enclave

Steven: (sighs) The Enclave are our sworn enemies. They're just a faction that's made up of the wasteland's former government known as the ''United States of America''. As for why they're our enemies, it's because they kill anyone that's not a member of the Enclave, either it be a radiated human, a super mutant, or a Ghoul, Feral or non-feral. AND YOU THREE DO NOT WANT TO COME ACROSS A FERAL ONE!!!!

Elder Lyons: trust Steven on this one. Feral Ghouls are very dangerous.

Kai, Felicity & Leela were shocked, but also a little pissed at knowing what & who the Enclave are now

Kai: wow, the Enclave almost sound like Nazis, but they're 100% not German.

Leela: They sound like they're even worse than them, but I agree with you Kai.

Felicity: (crosses arms) yeah, same here.

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Felicity: is it possible for the 4 of us to join the Brotherhood of Steel? we could be useful to you guys.

she said as he petted Fetch

Kai: yeah, I mean it could take a while for you guys to find a way to get us back home so why not join the brotherhood in the meantime?

Steven looked at Elder Lyons, who nodded at him and at Kai & his friends

Steven: well.... Elder Lyons doesn't see why not. BUT.....you three are going to have to go through some training and since you rescued me and my team, I'm going to return the favor by showing you the ropes.

Felicity: well I've been through some crazy stuff.

Leela: you've hospitalized several people because they didn't celebrate FNAF's second anniversary.

Felicity: they deserved it!

Steven: Wha- what? (shakes head) forget it. Just come on and we'll begin your training, okay?

Kai: We're ready.

Fetch then started doing the hyena laugh as they all followed Steven to begin their training as Brotherhood of Steel Initiates