Your OC is stuck on an island with the above OC.

As he studied the other figure, Uja felt his eye twitch involuntarily. It was a subtle little tic he was aware of by now--generally, the more things spiraled out of control, the more he found himself twitching and squinting, for whatever unfathomable reason beset his body. Mouth drawn in a grim line, he did his best to smooth out the beginnings of a very frustrating day.

Eli was strange, the type he knew would be a real character. The modifications were nothing to sneeze at; accustomed as he was to synthetics, his own kind, with bizarre self-alterations, things like blank eyes and exposed, beastly teeth weren't enough to turn Uja. What waited behind those teeth seemed at the very least peaceful. That was a good start.

"Well," he sighed, dreading the next impending twitch, "I suppose we ought to get to work. How much do you know about .... primitive architecture?"

From the way Eli's eyes lit up, it seemed Uja was in for more than a simple shelter for the night.

"Mon dieu, what a terrible misfortune, ah?" Valentine asked Uja while holding his cheek, despite his groan he was still smiling like an idiot. He was met with the other man squinting and twitching, to which the cupid merely laughed. "You are uncomfortable, non? But of course! We are stranded, ah~! But be at ease, mon ami, for help will be here shortly, oui! We must worry more about keeping ourselves busy!" He floated towards Uja and tilted his head at him. "Oh! You are not human! Humans, they have the stench of love, even if a small one. But you! You are severely lacking in such a scent, ah~! Tell me, mon ami, you must have at least ONE person you care for, non?" Valentine smiled brightly, making it clear that he wouldn't leave the android alone until he got a story.

She had been stuck on the island for a while now, along with several others. Despite the unfortunate nature of it all, and her absent memories, she had gotten used to living with the small group, which is why it was immediately rather startling to see someone unfamiliar roaming around. She was in the middle of her morning run, huffing and puffing away, when she caught a glimpse of the much taller... person(?) looming overhead. 

What... Who is that...?

Slowing to a halt, she quickly darted behind some of the nearby foliage before eyeing them up more carefully. She had met some odd people on this island, but this towering, spindly-limbed anomaly was the strangest by far, to the point she was fairly confident that they couldn't be human... could they? She thought about going for help; perhaps Yomi and Lenore could help her out. But she also got the feeling that the figure would likely be gone by the time she returned with back-up... she'd rather not give her friends reason to doubt her sanity.

But the more she looked at the figure, the more she desperately didn't want to approach them.

"Maybe... it's best to just go back the way I came...? If this becomes a problem, we'll deal with it then... right?"

Barnaby remained crouched in the shallow water. it watched as a child cooperated with the other humans on the island. they seemed to be trying to build a raft, an awful raft. At least they seemed to be having a good time talking to each other.  all except for one, what appeared to be a child making herself a little shelter. Barnaby felt somewhat proud, it had dragged a few unconscious people to shore and managed to remain unnoticed. it felt angry at the drunk captain.

  drunk boat driving kills, they could've drowned like me

"did you hear that?" the child asked.

"hear what? are sure you are okay?"

Barnaby held firmly onto the drunk boat captain. it rotated its skull as the child noticed it.

  no one will believe you, crazy  Barnaby sent the message to the child.

Barnaby gave a playful chatter of its jaws before the child turned away. with that Barnaby slipped into deeper waters, dragging the captain with it.

 i am dead, what are you?

Zinkur frantically looks around the Island. She seems to have crash landed with the only other survivor, Barnacle. She gets up on her long legs and runs around the small spit of land. "NO!! NO NO NOOOOOOOOOO!!!!!!!!", she screeches, likely hurting poor Barnacles ears. 

"I have things to do! I have a daughter to take care of! I CAN'T EVEN SWIM!", she screams as she flops dramatically to the ground. She buries her face in sand.

It was after she pulled her face from the sand she fully realized she wasn't alone. There was this... weird cat looking creature with a skull in it's head. She narrowed her eyes at them. 

"Hold up... what ARE you?"

He was face-down in the sand, passed out from the plane crash into the island. (He probably flew one of those personal airplanes with Zinkur for some reason.)                    He eventually awakened and sat up holding his head.

"Ugh........W-what happened."

He noticed that he was stranded.

"H-hold up! ...I can't be stuck here. Right?"

He looked at all of the surrounding water and knew that if he even did try to swim, it would kill him since he's part robotic.

"This is a frickin' island! There's water EVERYWHERE!? How did this even happen?"

A familiar voice was heard behind him.

"You crashed the plane genius! YOU got us into this mess. I don't know why I listen to you!" Zinkur wailed.

"Zinkur!? Oh right. You were in the plane. Anyways, don't blame me! You were uh... distracting me!"

"I was not!" She protested.

These two argued for a good amount of time. 

"You think you're so smart. Why don't you fix the plane?" Zinkur asked him as she folded her arms. 

"Listen, I fix robots. Not airplanes you moron," Desmond growled as he rolled his eyes. 

At this point Zinkur just kicked sand at him.

"W-wait! Before we get violent, I had an idea!" Desmond steps closer to Zinkur.

"What is your big idea Einstein?" She sighed. 

"Well, we could repopulate this island since it is only the two of u-"

Zinkur hit him in the face with a rock.

"NO! YOU STAY ON THIS SIDE OF THE ISLAND AND I WILL STAY ON MINE!!!!!" Zinkur yelled as she angrily stomped off.

"...Give it time. You will be back over here before you know it alien."

He was sitting under a palm tree, shaded by it's large leaves from the top and it's log, completely frozen and in place and unsure what to do. This whole time he had woken up in the hot hot sun, thinking that he was in some sort of beach and he had brought his son out here without a single thought. Unfortunately it wasn't his son that was with him. It was some blasted bear by him. This menacing looking beast definitely put Matias on guard and luckily he had snuck in a knife he always had with him. 

The Milkman wondered if he could just stab the hunk of flesh and metal and eat him? Are bears even good to eat? What if he wasn't an actual bear this whole time? He was clearly part robot. The fur must be artificial. Matias, this whole time was hiding from him, hoping that he'd wander away from the shore and to another area... or just die. He was better off working alone rather than someone he doesn't even intend to trust. And for the Milkman, he barely trusts a single man. 

He sighed. "What am I going to do? There's not even a drop of milk in sight."

Smiley stood at the shores of the island he was stranded on, his feet dug into the sand and the water pushing and pulling at his ankles. Seagulls cawed overhead, and behind him was a lush jungle.
He hated this.
There were no houses, no civilization, no 7/11's, and worst of all, no paper bags. He looked at his flannel, seeing a few bags stuffed in the inside pocket. This would probably last a day? Two if he was lucky. Smiley sighed, a tone that contradicted with the drawn smiley face on his mask. He turned his head to look at the disgruntled man standing besides him, obviously pondering whether choking him or not.
"I'm sorry. :)" Smiley said sheepishly. "I know that cruise ship was supposed to be fun, but I couldn't have any fun when those workers weren't giving me bright enough smiles. :) Then I saw a lady with one of those bags. :) Ooh, it makes me so mad just thinking about it. :)" His hands moved in front of him as if strangling something, almost recalling the events that happened. His arms eventually fell to his side as he gazed up at the sky. "Then everyone else was frowning and next thing I knew, we're out here. :)" He turned to face the Milkman once more. "I'll make it up to you! :) That was meant to be a romantic getaway, right? Well... This could be one too? :)" he suggested while opening his arms out to emphasize the island. The Milkman took a menacing step forward, and Smiley retreated one. "I-I'll make it romantic, don't worry! :) I'll build you a little hut and find deliciously exotic foods for you to eat! I read some interesting recipes about it? :)"
Almost as if he were a smitten schoolgirl and not a blood covered killer, Smiley laced his fingers together and swayed side-to-side as he fumbled with his thumbs. "But you know, just being alone with you is pretty romantic. :) It makes me happy. :)"

Then he got strangled.

Billy looked up to see the obviously taller guy looking down at him, smiling. Billy sweats as he backs up a bit. "W-Wow... You sure are... Happy?" He awkwardly asks. "Are you going to murder me?" 

After hearing the response of "I just want to help you smile :)", Billy mistook the sentence as literal.

"So you're not? You just like seeing people happy?" Billy shrugs in relief, thinking that this isn't his last time on earth and instead the making of a new friend. "Okay, I can be happy for you!"

Then Billy probably gets killed, the end. Rip.

Angelo sits on a remote island beach. He sits, and he thinks.

Will he be stranded on this island forever? Maybe. Will he be able to stand up to whatever horrors this island may have in store for him? Probably not. Does he care?

Not really, actually. He still managed to run away from home, and even if he didn't end up in the right place, this might still do him some good. After all, the aim of his mission is to get stronger or die trying! And what better place to test the limits of his own independence than in isolation, where there's nobody to rely on but himse--

There's someone else here. A tall, brown-haired man with big hair. He looks nice enough from a distance, but Angelo still scrambles behind a nearby bush to hide. He doesn't need anyone worrying about him; it's better if he doesn't bother this guy. Angelo watches as the man captures, cleans, and prepares a fish. This guy must really know what he's doing. And... did he already start a fire? There's not even dry wood around here, though maybe this stranger is so skilled, he knows a technique to make fire without it. Angelo decides he should keep hiding from this guy. He obviously has good enough survival skills to carry the both of them; Angelo could never hope to get stronger if he relied on him.

Venom is sunning herself on the sand when she notices a human (Angelo Summers) right next to her.

She is startled and starts to shake the rattle on her tail, until she decides Angelo probably is not a threat to her.

Venom slithers off to search for prey to eat.

“W-WHAT?!”

The last thing Hermes was expecting to see was an oddly brightly colored snake towering above him; did he piss off a family member a bit too much for this to happen? He was obviously just shaking there in fright, and without any hesitation in himself, he ran. To his dismay, when he ran out of wherever he was, he ended up running into the ocean. He didn’t realize this until he stopped.

“...oh.” He immediately headed back for shore, and just sat there on the beach. Was his bad luck really THIS bad?! Gods damn it. He could theoretically run or fly back to the mainland, but for all he knew, the mainland could be thousands if not hundreds of thousands or much further away. So he was stuck with a snake until help came. This was nice.

It wasn't every day one met a god.

Even a demon like himself knew to show proper respect, or at least what he considered to be proper respect; avoiding eye contact, being careful to address with grace and patience, and staying on his toes. The god introduced himself as Hermes, a god he knew well from his many religious texts as the messenger god, and he introduced himself in kind, attempting to be humble.

It was a few days before he asked why he did not just fly back to a mainland. 

How does one deal with the idea that even gods become lost? 

Boremir kept to himself for a few days after that realization, calculating how much resources there was on this island, how long could it sustain life? He had to keep his physical body on this plane alive, or he would just reform in the demonic abyss, a place he never wanted to return to. No matter how horrible the people could be in this world, they were still better than the abyss. He straightened his monocle and frowned as his calculations came to a total.

They had three weeks at most before they ran out of food.

It was the next morning when the Arcanaloth dropped a stone tablet in front of Hermes, boldly displaying a carving of a palm raft with a thatch sail. 

"Please, help me build this so we can leave this place. I beg of you."

"Okay, I don't know if a demon like you has to eat, but I do know how to catch fish without a fishing rod and start a fire, and I've got a general idea of some safe to eat plants, so I can handle food if you start working on a way for us to get out of here. It shouldn't be too hard for me to rig up something for a shelter, either." They grin, almost pridefully. "My boyfriend likes to take me camping with him, and he's really big on the whole 'live on the earth' sort of thing when we're out. He showed me a lot. It's fun, but I never thought I'd put it to practical use." The human hoped the demon wasn't expecting anything more meaty than fish however, they didn't really have the heart for hunting any bigger game. "and if it helps, you could borrow my knife once I rig up something for shelter. It's not the best for cutting trees and branches, but it's better than nothing."