Adventure Time © Pendleton Ward/Cartoon Network
Fallout © Bethesda/Interplay
a large door slid open with a mechanical whoosh, and Aiden and Marceline
entered a massive room that was full of lines of shelves like the aisles of a supermarket.
However, most of the shelves were quite empty with seemingly useless junk scattered about.
"whoa..." spoke Aiden, stunned at what he was seeing. "I knew we were running low on supplies, but the store room was never THIS empty.
"Well, you have been on ice for nearly 200 years." stated Marceline.
Aiden shrugged. "point taken...Alright, let's look around for *anything* useful."
Marceline and Aiden split up as they searched the seemingly empty storage room.
The pair didn't go far, only walking opposite sides of the shelves.
Marceline occasionally glanced at Aiden to keep an eye on him.
she hadn't forgotten about those giant cockroaches that she encountered prior,
and wanted to make sure that her new friend wouldn't get ambushed and seriously hurt.
(though she had to avert her gaze once Aiden turned away to look at another shelf,
as his blue Vault-Tec jumpsuit was rather 'tight' on him… Particularly around his posterior.)
("shiz, that's a nice lookin' butt.") thought Marceline...who smacked herself immediately.
("get your mind outta the gutter girl.") scolded Marceline. ("Aiden trusts you. don't break that trust by acting like a freak!")
Marceline tried to distract herself with a pointless search,
though she couldn't stop blushing as her mind lingered on how Aiden looked from *behind*.
"I gotta get him out of that lame jumpsuit, and find him something else to wher-"
Marceline then froze, and smacked herself again upon realizing the context of what she just said.
"Marc-"
"GAAH!" Marceline suddenly jumped as Aiden (somehow) snuck up on her.
"Is everything alright?" asked Aiden. "I heard a sound coming from here...It sounded like clapping."
Marceline winced at Aiden's choice of words. "I'm...f-fine. j-just thought I saw a...a bug."
"Oh, that is no joke. RadRoaches sometimes get in this place." spoke Aiden.
"They are simple enough to deal with on their own, but can be dangerous in a large group… which they often are in."
"yeeeah, I think I encountered some earlier." spoke Marceline, desperate to change the subject.
"In that case, we better find some good weapons." said Aiden, back on his search.
"Vault-Tec always have 10mm Pistols stocked in their Vaults. There should be one around-"
Aiden then spotted something laying on a shelf. "Ah-HAH! There's one."
Marceline looked as Aiden picked up a distinctively shaped handgun.
It had a long and narrow angular barrel with blue and yellow paint on the metal.
"a Standard issue Colt 6520 10mm autoloading pistol." spoke Aiden, as he loaded the gun.
"Each pull of the trigger will automatically reload until it's empty."
Marceline snickered. "You totally sounded like a commercial right there."
Aiden looked down awkwardly. "sorry. been hearing that slogan for so long, it's etched into my brain.
In fact, this is less of a Pistol and more of a Revolver. But there was a bit of a miscommunication from the weapon designer."
Aiden then grasped another 10mm Pistol, and handed it to Marceline after loading it.
"uhh...I'm not really the Gun Type. I prefer using my Axe." said Marceline.
"I understand, but I would feel better if you have at least ONE gun on you." said Aiden.
"You can't always get close enough to take a good swing at something."
Marceline exhaled, and finally took the gun. "Fine. If nothing else, I can hold it for you as a spare."
Aiden shrugged. "good enough."
Marceline watched as Aiden practiced aiming with his 10mm Pistol.
"You good at using that thing?" asked Marceline.
"little bit. There wasn't exactly a shooting range built into the Vault,
and the last time I fired a gun it was with a BB Rifle when I was 8."
"And how did that go?" asked Marceline.
Aiden grimaced as he reminisced on his distant past.
"I...shot my mom in the butt."
"THBBFT!, You WHAT?!" exclaimed Marceline, nearly bursting out laughing.
"It WAS AN ACCIDENT!, I SWEAR!" exclaimed Aiden.
Marceline was now laughing like a Hyena, floating backwards as she held her waist.
"You...Ha-Hah!, shh-shot your mom...Hee-Hee-, IN THE ASS!?"
Aiden became red-faced as the Vampire Woman continued to laugh while rolling in the air.
"LOOK. the gun went off and the bullet ricocheted off of the ceiling and walls.
It wasn't like I DELIBERATELY aimed it at my mom!, it just… somehow hit the mark."
"In that case, you are either a terrible shot and an incredible one." smirked Marceline.
Aiden said nothing. He just looked away, still feeling embarrassed.
Marceline took note of this and approached Aiden, putting her arm over him.
"hey. don't get all pouty, I was only teasing." said Marceline.
Aiden exhaled and shrugged. "I know...but it wasn't a very fun memory."
Marceline grinned at Aiden. "I take it your mom wasn't too pleased."
"oh, she was absolutely livid." began Aiden. "She took my gun away, and sent me to my room. I was grounded for a week."
Marceline snickered, but tried to hide it.
"but... I suppose... looking back... (*grins*) it was kinda funny."
"Hey, we all screwed up when we were little kids. Even I did." spoke Marceline.
"But it's okay to look back at those times and laugh about it.
Your mom would want you to think of those times...and not dwell on the bad things."
Aiden meekly smiled. "yeah."
"Alright, let's see how good a shot you are now!" said Marceline, changing the subject.
"What?"
Marceline grabbed some empty tin cans and placed them on an empty shelf.
She then pulled Aiden back far enough away and looked at him with a smile.
"Try and shoot those cans with your fancy gun." said Marceline.
"uhh...okay." said Aiden, raising his gun nervously.
(*BLAM!*)
Aiden fired at one of the cans...but missed. "damn."
"It's okay. try again." said Marceline, supportively.
Aiden breathed out, and fired again (*BLAM!*)
The second shot did better, but still missed. merely grazing the can slightly.
It wobbled, but managed to remain standing.
Aiden grumbled, but Marceline patted his back. "that was better, man. One more time."
Aiden exhaled as he aimed at the third can (*BLAM!*)
This time, the bullet hit it's mark and sent the can flying.
Marceline squealed and hugged Aiden. "YOU DID IT!, Good Shot!"
"Hold on...I wanna try something." spoke Aiden, as he tapped something on his Pip-Boy.
Marceline watched as Aiden aimed once again.
a strange sound emitted from the Pip-Boy, and Aiden's eyes glowed bright green.
Puzzled, Marceline looked at the Pip-Boy's screen, which showed a 3D model of the remaining cans.
((*BLAM!, BLAM!*))
Aiden shot his 10mm Pistol faster than normal.
Each shot not only hit its mark, but completely OBLITERATED the tin cans.
"whoa." said Marceline, stunned.
The green glow finally faded from Aiden's eyes, followed by a weary breath.
"what... was... THAT?!" exclaimed Marceline, astonished.
"Oh, I just used VATS. All Pip-Boys are equipped with it." said Aiden.
Marceline tilted her head like a dog when it hears a strange sound. "Vats?"
"oh, right...you don't know." said Aiden, realizing that Marceline had no idea what he was talking about.
"I meant to say that I used the "Vault-Tec Assisted Targeting System" Called "V.A.T.S." for short.
It is kind of like an Aim Assist where my Pip-Boy syncs with my brain to enhance my perception,
allowing me to aim at a given target's weak points based on percentage of accuracy."
Marceline stared blankly as she tried to process what Aiden just said. "do you come with subtitles?"
Aiden blushed, and breathed out sharply.
"sorry...what I meant to say is that I used a feature in the Pip-Boy
to make me visualize time slowing to a crawl, allowing me to shoot at a target's weak points."
"HOW does that even work?!" said Marceline, still confused.
"I...don't know. The secrets to this technology was lost, even in 2077." answered Aiden.
"okaaay. Maybe you'd better use that "magic sight" from now on." said Marceline.
"uhh, I actually can't do that. using VATS drains me physically." explained Aiden.
"It's not so bad if I use it a few times, but I can't depend on it all the time."
"Ah...I see." said Marceline, starting to understand. "Still cool, though."
Aiden nodded. As he reloaded his gun, Marceline resumed checking the shelves. "Hey, what's this?"
Aiden looked, and saw Marceline holding up what looked like a children's book made for toddlers.
The cover read: ["You're S.P.E.C.I.A.L."]
"oh. That's a book mom used to read to me as a kid." said Aiden. "Said it was supposed to help me with growing up. I never really got it."
Marceline decided to amuse herself and took a quick look inside the book.
Predictable, it had very simple pictures and was written like a Poem.
['S is for Strength, and that means I am strong!
I can carry lots of toys and swing stuff all day long!']
['P is for Perception, a long funny word!
It means what I tasted, smell, saw and heard!']
['E is for Endurance, and that's how long I can play!
I'm always really healthy, and have energy all day!']
['C is for Charisma, it's why people think I'm great!
I make my friends all laugh and smile, and never want to hate!']
['I is for Intelligence, it means I'm really smart!
I use my brain for lots of stuff, like science, math and art!']
['A is for Agility, that's how I get around!
I move real fast and easy, and I never make a sound!']
['L is for Luck, and it's simple, you see!
It means that good things always happen to me!']
Marceline chuckled. "this is so corny, it's almost kinda cool."
Marceline then looked at Aiden, and saw him packing a blue and yellow Rucksack with whatever items that he had managed to find thus far.
Once his back was turned, Marceline grinned like a gremlin and slipped the children's book into the pack without Aiden knowing.
"now where are those...AH-HAH!"
Aiden pulled out a white box with the word 'MEDICAL' printed on it.
Marceline stood near Aiden, looking at the contents of the Medical Box as he opened it.
"Is… that a blood pack?" spoke Marceline, eyeing a specific item.
"Close, it's a Rad-Away." said Aiden.
"It cleanses the body any radiation infection via injection into the bloodstream.
And, no. it isn't blood. It's a chemical solution that only LOOKS like blood."
"oh, darn. and it looked so delicious!" said Marceline, sarcastically.
"ha-ha." said Aiden, catching the Vampire's wit.
"And THOSE?" spoke Marceline, pointing at what looked like a Syringe.
"Oh, THESE are very important. They are called StimPaks, or Stims." began Aiden.
"One shot can instantly even the most severe of injuries. Mom called it a miracle of medical science… though it has its limits."
"Not a whole lot in the box..." mused Marceline.
Aiden sighed, noting that there were indeed only TWO Rad-Aways, and Three StimPaks.
Which wasn't very much for two people, but it was better than nothing.
"hopefully there are more here somewhere.
"and if not?" asked Marceline.
"Then we'll need to scrounge up what we can to make our own." answered Aiden.
"Okay… How do you make one of those StimPak things?"
Aiden checked his Pip-Boy. "let's see...we would need Steel for the Syringe. some Antiseptic chemicals, and...OH."
"what?"
Aiden looked at Marceline awkwardly "a...pack of...Blood."
Marceline grimaced (and also blushed a little.) "oh...well, that's awkward."
"yeeeah, let's discuss this later." said Aiden, nervously.
Aiden and Marceline looked away for a moment.
"um... d-do you... ss-see any sunscreen in there?" asked Marceline. "because... you know...I'm a Vampire, and if it's daylight when we leave-"
"Just one." said Aiden, picking up a bottle and showing it to Marceline. "As I kid, I used to get horrible sunburn… still do sometimes."
Marceline looked at the bottle of sunscreen. "we could… share it."
"no-no. At worst, I'll just get a rash." spoke Aiden. "But you?... no, YOU will need this more than I do."
Marceline smiled as she reluctantly took the sunscreen. "thank you, Addie."
"Still... One bottle of sunscreen won't last too long." began Aiden. "There has to be something else here that'll protect you from the sun."
"Back in Ooo, I had a Sunhat. Apart from that, I usually kept an Umbrella with me." explained Marceline.
Aiden frowned. "I don't think there are any umbrella's here. Very slim chance of rain in a Vault."
Marceline couldn't help but chuckle at this. "no shizz."
"but maybe..." Aiden then suddenly ran off like a shot.
"Wha-, AIDEN!" Marceline flew after Aiden.
Aiden finally stopped at what looked like a large steamer trunk placed against a wall.
Once Marceline caught up with Aiden, she saw him open the container and pull something out.
"this was my mother's. She… used to garden as a hobby." Aiden turned and presented to Marceline a rather large Sun Bonnet. "would this work?"
Marceline took the sun bonnet and briefly put it on. "not as big as the one I had... but I suppose it'll work."
Aiden smiled while Marceline put her now personal items in the Rucksack.
"Anything else in that thing worth taking?" asked Marceline.
"not much... just some of mom's old bobby pins." said Aiden.
"ooh!, I'll take those!" exclaimed Marceline, snatching up a pouch of pins.
"Why?" asked Aiden.
"For picking locks, of course!" said Marceline.
"Is that really a necessary skill to have?"
Marceline gave Aiden a look which made him quickly decide to 'pick his battles'.
"Okay-OKAY. I guess you know more about this survival stuff than I do."
"damn straight!" said Marceline, lightly punching Aiden's shoulder.
"I guess we'd better get going now." spoke Aiden, as he strapped the Rucksack to his back.
"I don't think there is anything more that we can salvage here."
"You sure?" inquired Marceline.
"yeah. there's nothing else left here… Nothing."
Aiden then tensed up as he looked down, deep in his own thoughts.
While not a mind reader, Marceline could almost sense what Aiden was thinking about.
So the vampire woman grasped Aiden's hands, and looked at him.
"you're right. we should get going." said Marceline, her voice tender.
Aiden sighed as he turned and started to walk off. Marceline walked with him, placing her hand on his shoulder.
Aiden kept his eyes on the ground, a saddened look on his face. Marceline then switched tactics, and held Aiden's hand firmly.
Aiden finally looked at Marceline...who smiled at him.
"it's okay, Addie... I'm right here with you." reassured Marceline.
Aiden stared at the pale skinned woman...and then managed a meek smile.
Marceline took that as a victory on her part, and winked/grinned at the human.
Just then, the pair heard a faint chittering sound.
"oh, grob. don't tell me that's-"
Aiden switched on his Pip-Boy's flashlight and shined it, illuminating the darkness.
He gasped upon seeing Five or Six giant Cockroaches of varied sized crawling on the walls and ceiling.
"my god... I've never seen so many RadRoaches in one place!" exclaimed Aiden, stunned.
((*SKREEE!*))
one of the RadRoaches lunged at Aiden, prompting Marceline to move between them and take a swift swing of her Axe-Bass, slicing the insect clean in half.
As the other five RadRoaches attacked, Aiden quickly drew out his 10mm Pistol.
((*BLAM!, BLAM!, BLAM!*))
Aiden fired his gun, which managed to hit a few Roaches, but missed others.
But Marceline was prepared, and threw wooden stakes at the RadRoaches that Aiden missed. Impaling them.
Unfortunately, the last remaining RadRoach managed to pounce on Aiden.
Needless to say, the young man freaked out as the giant bug wriggled and snapped at him.
"AAH!, G-GET OFFA ME!"
Adien did his best to hold off the RadRoach, until- ((*SHINK!, SPLORCH!*))
Adien gasped as something sharp pierced through the RadRoach's thorax.
It was then ripped off of him, and Aiden watched as Marceline ripped it apart with her hands.
Aiden froze as he stared at the expression that Marceline was making.
Gone was her pretty face. It was now contorted into something that looked more gruesome.
Her eyes were a full dark green with gleaming red and slit shaped pupils.
Her mouth was full of razor sharp teeth, with a serpent-like tongue wriggling.
Marceline was also hissing and growling inhumanly, sounding almost like a feral animal.
Marceline breathed heavily. but then looked down at Aiden… and saw his fearful expression.
The Vampire Woman quickly shifted her face and body back to it's normal state.
She then stepped back, a look of shame replacing the fury that she once had.
"I...i'm sorry, I-" Marceline turned away, unable to look Aiden in the eye.
Aiden quickly got up and approached Marceline. "m-marcy?"
Marceline tensed up, refusing to look at Aiden.
"I didn't want you… to see me like that." stuttered Marceline. "I didn't want you to look at me like… like I'm a monster."
Aiden touched Marceline's shoulder and made her look at him. "you're not a monster, Marcy."
Marceline frowned. "I saw the look of fear in your eyes. don't deny it: You were scared of me."
Aiden frowned, feeling guilty. "I was only… Shocked. Everything happened so fast just then.
and Yes, you did look scary. but that doesn't mean I'm afraid of you."
Marceline didn't look too convinced… so Aiden hugged her.
"it's okay Marcy...I still trust you with my life. I mean... You DID save me just now, right?"
Marceline took a moment to think back to her past.
She remembered when she first became a Vampire Hunter (LONG before she herself became a Vampire)
and how she dedicated herself to protecting other humans in order to honor her memory of Simon.
But no matter how many times she saved and protected what remained of mankind,
they still feared her. Regarding her as a monster because of how scary she looked, and never even giving her a chance.
but Aiden was different. Like Finn, he accepted her… even if she were a monster.
Marceline then hugged Aiden back, shedding a tear as she did.
"thank you...but I'll try to control myself better." said Marceline. "I don't want to scare you again."
"no, Marcy. you didn't do anything wrong." said Aiden, as he parted from the Vampire.
"I'll just… need to get used to all this. Don't ever be afraid to be yourself around me."
Marceline looked at Aiden...and then smiled. "grob, I wish I had a friend like you when I was growing up."
"same." said Aiden.
There was a brief moment of silence as the pair stared at one another.
They finally broke away, and awkwardly looked around at the insect corpses.
"well, Marcy… looks like you were right." spoke Aiden, finally.
Marceline looked at Aiden. "about what?"
"That I *NEED* someone to watch my back once I leave this place.
If I couldn't even defend myself against RadRoaches on my own,
then I won't stand any chance against whatever else is out there in the Wasteland."
Marceline looked at Aiden. She then smiled and took his hand.
"maybe you would... and maybe you wouldn't." began Marceline.
"but as long as we stay together, I am sure there is nothing out there that we can't handle."
Aiden looked back at the dark girl...and smiled back. "yeah...you're right. We got this."
After a long moment, the pair finally parted and began to walk back out of the Storage Room.
Both their hands linked together in a firm grip.
[Later]
Aiden and Marceline walked past a sliding door and into the Vault Atrium.
Aiden was silent, but Marceline could sense his anxiety "aiden?"
"i'm gonna miss this place." spoke Aiden, softly. "I know I can't stay...but for the longest time, this was my home.
and I can't help but feel... Sad. about leaving everything I knew behind... again."
Marceline patted Aiden's shoulder.
"yeah... it's never easy leaving home. I've had to do it several times.
But 'home' is more than just a place. and that's all this Vault is now: just a place.
I don't know where we'll go from here... but wherever it is, we'll make it our new home."
Aiden blushed at Marceline's use of the words 'Our Home'.
"r-right...You're right." stuttered Aiden.
Eventually the two made it to the still sealed shut door of Vault 110.
The very place where Marceline's strange journey literally began.
"Well… there it is. Our way out of here." spoke Marceline (also feeling jittery.)
Aiden looked to Marceline. "May I see your Pip-Boy for a moment?"
Marceline was about to remove the wrist device, Only for Aiden to reach and pull out a familiar cable.
"I only need this." said Aiden, as he inserted the cable into a port on his own Pip-Boy.
"Mom's Pip-Boy had all the clearance codes for the Vault." explained Aiden. "I should've said something before, heh-heh..."
Marceline also chuckled lightly before looking at the screen of the Pip-Boy. Apparently some data was being transferred from hers, to Aiden's.
a beep then sounded, indicating the Data Transfer was now finished. Aiden then detached the cable, letting it wind back into Marceline Pip-Boy.
"Alright, that should do it." said Aiden.
Marceline looked confused. "do-what?"
"I uploaded all of the data from Mom's Pip-Boy into mine." explained Aiden, again. "Among other things, I have the codes we need to unlock the Vault Door."
Marceline checked her Pip-Boy, and noted that old files that had once been in it were gone.
NOW, the Pip-Boy was a clean slate that even had a different username on it: [MARCELINE ABADEER]
"cool." said Marceline. "guess this really is mine now."
As Aiden approached the console, Marceline followed him. Aiden pulled out the cable of his Pip-Boy,
and was about to insert it into the console port... only to freeze, staring blankly at the dusty screen.
Aiden then looked to the massive, gear-shaped door... and let out a deep sigh.
"I haven't been on the other side of this door since I first came in here." began Aiden.
"even with the past 198 years being just a moment for me... It still feels like a lifetime."
Marceline looked at Aiden with soft eyes.
"i'm... I'm scared, Marcy." spoke Aiden. "I know I can't stay here...but I'm still afraid to go out there."
Aiden hung his head low. "GOD, I'm so pathetic."
"stop it, Aiden." said Marceline, sternly. "stop being so harsh on yourself."
Marceline then touched Aiden's jaw, and made him look at her. "It's okay to be afraid... I don't blame you for feeling the way you do.
There was a time when *I* was afraid, and you know... I had every reason to be. But things are different this time. I'm not afraid of what's out there anymore.
And as long as I'm around (and I *WILL* always be around), YOU don't have to be either."
Marceline then caressed Aiden's cheek and smiled at him. "I'm here for you, Addie... Always."
Aiden stared at Marceline...and then breathed out, finally smiling.
His courage back, Aiden finally inserted the cable into the Consoles port. The security codes automatically uploaded, and then the screen went into Stand-By Mode.
Aiden then breathed out, reaching out his shaky hand towards the big red button. Marceline then placed her hand upon Aiden's. she looked at the human, and smiled at him.
The two then placed both their hands onto the red button... and pressed it down together.
[Music: Fallout 4 Theme]
An Alarm blared as a siren flashed, followed by a loud metallic creaking sound.
Aiden and Marceline then watched as some large machine lowered down from the ceiling.
a crane then moved the machine towards the Vault door, until it locked itself into it's center.
It was then that Marceline realized that the machine was pretty much the world's largest screwdriver,
which after making clockwise turns, began to pull back and POPPED the metal door out of its socket.
With long, mechanical grinding the cog-like door slowly turned to it's side.
As it did, rays of light began to shine through the cracks before illuminating the room once the door had finally come to rest.
At first, Aiden tried to shield Marceline from the light. But he and Marceline soon relaxed upon realizing the light was artificial.
On the other side of the door was another, smaller entry room where the door that led outside TRULY lay in wait for the pair.
a Catwalk then extended towards the now open door. and once locked in place, an Automated voice sounded.
(("THANK YOU FOR USING VAULT-TEC.
PLEASE EXIT THE VAULT IN A CALM, ORDERLY MANNER."))
Aiden breathed out sharply, trembling as he stared into the now giant open door. Marceline felt his anxiety, and proceeded to hold his hand firmly.
Aiden looked at the Vampire, who looked back at him with blood red eyes that were as soft as can be.
Marceline then put her arms around the scared human and gave him a warm, comforting hug.
"remember...like your own shadow, I'll be right there with you no matter where you go." said Marceline.
Aiden gently ran his fingers through Marceline's long, black hair as he hugged her back.
"but where are we going to go?" asked Aiden, genuinely unsure of what to do.
Marceline pulled away to look at Aiden. "I don't know. But I once read somewhere that the journey of 1000 miles begins with the First Step."
Marceline then grasped Aiden, and floated them both over to the open Vault Door. "...and our first step is right out there." finished Marceline.
Aiden now stared out into the illuminated entry room where the true Vault Door leading outside lay in wait before him.
He closed his eyes, inhaled deeply... and Finally took his first step out.
...The first step of what would surely be many to come.
[To be Continued...]
[Author Notes]
Apologies for the longer wait on this chapter. I didn't start the New Year off to a great start
and personal issues forced me to postpone updating while I sorted things out.
(I literally finished up editing this chapter just minutes after I had to go on a business trip today!)
That said, let's talk about the chapter for a bit.
For the most part, this chapter served as Fan Service for Fallout fans by using the Storage Room as a framing device
to show off some vital items and game mechanics that Fallout players (especially Fallout 4 players) will recognize.
the 10mm Pistol is every Fallout player's starting weapon, and Stimpaks, RadAway and Bobby Pins are essential items
(I had fun writing about how RadAway kinda looks like blood given how Marceline is a Vampire.
As well a show an ingredient to make your own Stimpaks in Fallout 4 ACTUALLY IS BLOOD.)
I also wrote in a way to make VATS more realistic, and not just a "videogame trait"
(though even the Fallout Wiki isn't sure HOW it works, only that Vault-Tec developed it Pre-2077
and how they did so is lost to time. Which is another way of saying: "we don't know.")
I also tried giving Adventure Time some fan service with some Marceline scenes. Particularly her NEARLY going full Vampire mode
when fighting the RadRoaches and feeling bad that Aiden saw her acting like a monster
(not sure if it's canon that Marcy cares about that or not. but in this story, she doesn't want Aiden to be scared of her.)
I also double down on how Aiden is similar to Finn with Marceline namedropping him in her thoughts.
While a bit more mature and intelligent, Aiden shares Finn's good nature
(which is why Marceline is taking a liking to him. Sort of an alternate take on "Finnceline")
But of course, the main event is the two leaving Vault 110. Which is based heavily on the moment in Fallout 4
where the player character leaves Vault 111 for the first time.
It's a very emotion driven moment where you take a big step into an unknown world that you may not be ready for.
If you've ever played Fallout 4, then you'll know what I mean.