Author's Note: Hello! Welcome to another Murphamy fic that I wanted to write because now I really ship this too much, oops. So, here is the Ark AU.
This one will have multiple chapters, so I hope you enjoy!
As always any comments or criticism would be loved! Thank you for reading!

Bellamy Blake could not help but think the guard's uniform did not look right the first time he put it on. He fidgeted with it momentarily, flattening out the sleeves and pressing his hair down, looking at himself in the mirror, his brown eyes staring back at him with a blank expression. How could he protect the people of the ark by becoming one of the very people that oppressed them, that killed them for any mistake or simple things, such as having another child? But, Bellamy knew that he had to do this, for his family, for his mother, for Octavia.

At that moment Octavia appeared behind Bellamy, and he quickly turned around to her.

"Hey, looking good, Bell, you were made to wear that uniform."

He smiled warmly at her. "Hey, O… Thanks, I'm going out today, it's my first day as a cadet."

He saw a brief flicker of sadness flash across her face as he always did when he left their room, but then she smiled at him. "I know, you've told me a million times. You'll do great."

Bellamy nodded. "Don't you worry, I'll tell you all about it when I get back tonight."

Octavia raised her eyebrows. "I don't know if I can trust you to do that, you'll probably come up with tales of how you stopped a murder from going down when all you did was yell at a kid for taking too much ketchup."

Bellamy laughed. "I'll try my best to stay truthful, but no promises, I do love a good story."

Octavia patted his shoulder. "Alright, Bell, but seriously, just promise me you'll be careful."

"Of course I will," Bellamy told her reassuringly, "I always am… you be careful, too."

"I'll try not to beat myself at solitaire while you're gone." Octavia commented.

Bellamy sighed. "Make sure to—"

Octavia cut him off. "Yeah, I know, to hide under the floor if I hear any footsteps nearby or doors creaking open. I've been alone many times before, Bellamy, I'll be fine."

Bellamy nodded, looking down at the floor. "Good… well, I'll see you tonight…"

She looked at him. "See you, Bell, good luck."

He shot a half-smile in her direction before looking cautiously out the door, and discovering an empty hallway, closing the door behind him.

Bellamy took a deep breath once he was out, and stood up straight. He could do this, he had to do this. He walked towards the recreation area.

David Miller, the chief guard, greeted Bellamy when he arrived. "Bellamy Blake, right on time. You ready?"

"Yes, I am, Mr. Miller," Bellamy replied, steeling his gaze at the man.

"Good," Miller gave Bellamy a small smile, "Today, I just need you to watch over this area, make sure everyone and everything is in order. It shouldn't be too much trouble, usually just a few kids causing issues…nothing big. But if you do find something serious, you radio in right away and do not let the suspect escape… just remember that, for now, you are in charge here…"

Bellamy nodded.

Miller looked at him seriously for a moment. "You seem like a good kid, Blake… So, I know that you'll remember our priority is to keep our people safe… we don't need to punish anyone who doesn't deserve it."

Like you say my sister deserves, Bellamy thought, reflecting on the contradiction in Miller's words, but he did not say any of that. Instead, he clenched his jaw and said, "Of course, sir."

"Okay, great, I'll see you in seven hours at the end of the day. Your lunch shift is in three hours, don't forget to switch out during it. Good luck."

"Thank you," Bellamy said, as Miller walked out of the area.

Bellamy scanned the recreation area curiously as he walked over to the side of a wall, standing straight in front of it. Bellamy visited the rec room only on occasion, as he often preferred the company of being alone in the room with his sister, though he did not have much choice in the matter; his mother was hardly ever home anymore and he did not want to leave Octavia alone any longer than she had to be. The room was beginning to get populated as people made their way in to greet a few people before they went work, bring in their breakfast to eat, or stay and socialize.

In the corner close to him Bellamy recognized Wells Jaha playing chess against a girl with long blonde hair, who was currently beating him significantly as far as Bellamy could tell, when another guy walked up behind the two. The guy was fairly skinny and a little shorter than Bellamy, as far as he could tell, and he was dressed in a simple dark jacket, his dark hair slightly lengthy, and skin slightly pale. Bellamy watched as the two were too engrossed in their game to notice him glance at them briefly, a smirk forming on his face before he exaggerated a trip forward, knocking the game board to the floor with his elbow.

Bellamy narrowed his eyes at the guy, walking over to the table.

"Hey! What…" Wells Jaha exclaimed, still holding a chess piece in his hand.

"Oh, I'm sorry about that, chancellor," the guy was saying as Bellamy walked over. "I hope I didn't cause you to lose, wouldn't think that could ever happen to someone like you."

"Hey," Bellamy said forcefully, when he reached the table, "Is there a problem here?"

Wells opened his mouth to speak but the girl cut him off. "No, of course not, we were just about to pick up our game."

"Yeah, there's no problem at all, sir, I just seem to become really clumsy around the chancellor's son, it's not like I've murdered anyone or anything." The guy's blue eyes bore into Bellamy's. "Don't you have something more important to do than catch people who knock over games? Like, I don't know, maybe float some innocent bystanders or something?"

The guy's tone was condescending and rude, and Bellamy glared at him. "Don't talk to me like that."

The guy laughed and stepped closer into Bellamy's personal space, getting in his face. "You're just saying that because it's true."

Bellamy was sure everyone in the room was watching them by now. He could not back down now, no matter how he felt about the guy's words, not when his sister was probably hiding under the floor in his room at this moment. "What's your name?" Bellamy asked him, holding his glare.

"Murphy," he replied, coldly, "John Murphy."

"Murphy," Bellamy enunciated, standing up straight with his shoulders back. "You leave this area right now. And I don't want you bothering these people anymore." He gestured to Wells and the girl. "I'll have you detained if this ever happens again," Bellamy continued, unsure if he meant his words.

Murphy just stared at Bellamy in anger for a long moment, his fist clenching at his side, and Bellamy began to worry that he would refuse, especially considering his recent behavior. He did not appear to be the smartest person to Bellamy at the moment, considering the punishment he could receive for a pointless stunt such as this.

However, Murphy did not further the confrontation. He slowly unclenched his fist, and stepped out of Bellamy's space. "Yeah, whatever, it's not worth it anyways." He glared briefly at Wells, and then at Bellamy. "Don't let me stop you from enjoying your recreation!" He exclaimed, brushing past Bellamy with force as he walked away.

Bellamy sighed exasperatedly as Murphy left. He then looked at the two who had been playing chess. "Sorry about that," he said, crouching down to pick up the rest of the chess pieces.

"It's fine," the girl replied, picking up the last chess piece, "We could have handled it."

"I had to make sure," Bellamy said, standing up.

"Yes, I understand," she told him, looking at his uniform, "Are you new to this section?"

"Today is my first day."

"Well, I should tell you that Murphy is always causing trouble around here, it's nothing new and not anything serious."

Bellamy nodded. So he's always like that? "I'll keep that in mind."

"Everything is fine, you can all go back to what you were doing." Bellamy called to a few people still staring at him, and walking back to the wall of the room.

As he stood there for the rest of the day and ate a sandwich on his lunch break, all Bellamy could do was curse himself for the situation. He had drawn unnecessary attention to himself, and he should not have let himself get into a confrontation with Murphy.

At the end of the day, David Miller returned to the rec room, and walked over to Bellamy.

"Blake," he greeted, "I see you've made it through the day. I heard you had a little trouble earlier?"

"Nothing much, sir, like you said," Bellamy replied.

Miller nodded, giving him another small smile. "I knew you'd be good for this."

"Thanks."

"You're free to go now."

Bellamy nodded at him, and walked quickly away, wanting to go back home.

Bellamy opened the door to his family's quarters quickly, looking around for his sister. She was nowhere to be seen. He felt a stab of worry in his stomach, but pushed it down quickly, knowing it was unfounded. "It's just me, O."

The floor panel opened and Bellamy smiled as his sister's head poked out of it. "You're finally back."

"And you've learned how to hide quickly well."

"I knew you'd appreciate that." Octavia smiled back at him, out of the floor, and replacing the panel.

"I do," he said, proud of her. Then, he paused. "Mom home tonight?"

"No."

Bellamy nodded, sitting down on a chair, and untying his boots. It was hardly surprising, she was hardly ever home at night anymore, but Bellamy couldn't help but feel a twinge of sadness each time.

"So, how was it? Did you catch any crazy serial killers?" Octavia asked, smirking.

Bellamy chuckled lightly, kicking off his boot. "Not quite."

She sat down across from him. "What was it then? I know it's something, you've got that face."

Bellamy kicked off another boot. "I haven't got the face," he argued fondly.

"Yes, you do, and you promised you'd tell me."

He looked at her. "Well, it's not as exciting as a serial killer, but it was strange…" Bellamy proceeded to detail the entire day to Octavia, pausing when she laughed at Murphy knocking over the chancellor's son's chess board.

"That guy is an idiot," she said, finally, when Bellamy was finished.

"I know!" Bellamy exclaimed, "That's what I was thinking, I don't think he was thinking much when he did that." Not that I was thinking much when I decided to go pick a fight with him, Bellamy thought.

"He could get jailed or floated for that if someone besides you wasn't on guard there." Octavia said.

Bellamy frowned, wondering that has ever almost happened to Murphy before; he'd have brought it upon himself, but he couldn't bring himself to believe that he would deserve it.

She smiled at him. "You saved him, even though he was an idiot."

"Please, Octavia, I'm sure the other guards would have just ignored it or something, I went in there and provoked him."

Octavia just continued to smile at him, giving him a smug look. "Nah, they might not have. You saved that Murphy guy, Bell, you just don't want to admit it."

Bellamy smiled slightly at her. "You're just too good for me, O."

"You know it."

Bellamy laughed.

"You're not a bad big brother either." Octavia said.

"Wow…" Bellamy stood up from the chair, putting his hands up in mock surrender. "This is getting way too sappy for me, now… I'd better get to bed." He went towards his bedroom, a small room in the corner.

"I take it back, you're an ass, Bellamy!" he heard Octavia yell from behind him as he closed the door.

"Love you, too," he yelled back, smiling, and pulling off his guard uniform. He plopped himself onto his bed with exhaustion; stress and arguing had taken a lot out of him. Bellamy was only left with his thoughts for a few moments before he fell asleep, in which he wondered if he would ever encounter Murphy again, and if he would get into any more trouble.

The next morning Bellamy saw his mother briefly before she left for work, and she managed to congratulate him on his successful first day at the job after he'd reminded her he had his first day. She also spoke briefly to Octavia, asking about how she was doing, before leaving, and they had told her everything was going well.

When Bellamy left that second morning to stand guard at the rec room, he searched the crowd for Murphy, meaning to keep track of him in case he caused any more problems, that Bellamy could hopefully prevent so the guy did not have to go to jail for being an idiot. Bellamy was beginning to think that he would never see him again, and that his day would pass by with the only issue being a girl dropping her cake on the floor and crying because she wasn't allowed another (until Bellamy bought his own and gave it to her), when he spotted Murphy again.

Bellamy saw Murphy's head pop out around the crowd and he watched as Murphy walked across the room, munching on a protein bar of some sort, a purposeful expression on his face. He walked over to and glanced quickly in the direction of a kid that appeared to be of a similar age, though he wore a dark beanie that obscured most of his facial expression from the angle of the lighting that Bellamy was watching from. Murphy gestured to the beanie guy with urgency, and beanie guy walked casually over to him. The two walked beside each other, as Bellamy thought they were probably talking to each other, when Murphy glanced around the room, only to make direct eye contact with Bellamy.

Murphy's expression immediately turned into a surprised one and he broke the eye contact, and grabbed the beanie guy's arm, hurriedly urging him back into the crowd. Curiosity and uncertainty filled Bellamy's mind, and he walked over to the other side of the room and sat down at a table in the corner quietly, keeping track of Murphy and the guy out of the corner of his eyes. A few moments after Bellamy had sat down discreetly, he saw Murphy and beanie guy walk out of the crowd, glancing around quickly and brusquely walking out the door into a hallway.

Bellamy frowned to himself, wondering what the two could be up to, if they were even up to anything, they could just be friends. Somehow, Bellamy highly doubted the former as they appeared very suspicious.

Bellamy jumped out of his seat and hurried over towards the hallway that the two had exited, stopping right before the entrance to glance around quickly to see the back of the beanie guy facing him.

"…have to be more careful, Murphy!" Bellamy heard the guy saying, his voice a low, but harsh whisper.

"I know! The guard knows me now, and he's an arrogant—"

"It doesn't matter who he is!" The guy's hands gestured wildly, "You drew his attention to yourself with that stunt yesterday, what were you thinking? We could get caught? What if he's suspicious of you now?"

Bellamy smirked to himself, standing next to the entrance, hidden from their view.

Murphy sighed exasperatedly. "I don't know, man, he probably doesn't suspect anything, but I had to get us out of there just in case. You know you can't be seen near me, your father would have a fit."

"Exactly, Murphy! You didn't think before you acted! Next time you decide to do something stupid that will get you caught, remember who else you might be dragging down with you. We can all deal with you getting yourself in trouble, but don't drag us down with you." Silence passed by them for a moment, until the guy spoke again. "We'll meet in this hall tomorrow night when everyone is having dinner, alright? Don't be late and please don't get us all killed or imprisoned before then."

Bellamy could hear the guy's footsteps coming his way, so he quickly darted to the side, resuming a neutral stance by the wall. He watched as the guy emerges from the entrance, glancing around as he does so, and Bellamy resolutely looked away from the guy. When he looked back, he saw Murphy barge into the area, shaking his head in frustration, and walking out of the rec room.

At that point Bellamy was certain: Murphy was up to something, and Bellamy was going to figure out what it was.