A/N: Wau, my first crossover! and it's not even Kh or FF related haha ^^" So, I've been obsessed with Frozen now, and I'm more obsessed with the Jack and Elsa pairing, so I thought, why not make a story about it? I honestly thought the ending was kind of rushed, but I felt too lazy to make this a multi-chapter story. But anyways, on with the friendship~

The movies, Frozen and Rise of The Guardians and their characters belong to Disney and DreamWorks, I'm just a girl that writes made-up stuff about them QQ

It's been three years since the major incident, but it seems that the kingdom of Arendelle was running smoothly; the citizens were happy with the new queen's powers (which she was still trying to control) and her younger sister was happy to declare her engagement with her tall, gentle, and somewhat sarcastic fiance, Kristoff. Elsa didn't know how long she had watched Anna and her soon-to-be-husband from the sidelines; but don't get her wrong, she's happy that her younger sister had decided to marry the built ice-seller instead of that no-good-of-a-man Hans (honestly, Elsa should've froze him instead of shipping him back to his home land...) but to be quite honest, the elder blonde was hoping she could live the same kind of life. But then again, who was willing to marry someone who might accidentally freeze them? No one. Maybe she wasn't meant for a life of love; maybe she was just meant to keep Arendelle from crumbling (god knows what would've happened if she stayed on the mountain and Anna took over...)

Oh well. Anna is happy with Kristoff, and as long as she's happy, I guess I am, too.

But still, even with that thought, Elsa still couldn't help but think that someone- anyone- was still out there for her.

Who knows, maybe he'll appear out of nowhere today.

Yeah, right.

Jack didn't know what the hell he was doing. There he was, aimlessly flying around the world, checking to see if anything out of the ordinary was happening. Damn that accursed kangaroo for volunteering him... He was a guardian for god's sake, he didn't have to be travelling around the world to make sure everything was okay from every freaking country... well, maybe he did, but he'd rather spend another snow day with Jamie. Yes, Jamie was still able to see him, but Jack was starting to feel like it won't last very long. After all, Jamie's in middle school now, this is usually the time where kids stop believing in "fabled characters". But he knew Pitch wouldn't come back, Jamie knew better. But this doesn't really help with Jack's mental complaints

Why couldn't Tooth do this with me? Or even that stupid kangaroo! I mean, he can travel around the world in an instant with those stupid portals of his.

Unlike Jack, Toothiana (or Tooth, for short) had an all-around job of collecting little kids' teeth. Jack always wondered how she's able to stand the sight of some of them, but he's never really gotten around to asking. As for Bunnymund, well, he and Jack still don't really get along.

Aside from the complaining, Jack has actually wanted to visit this next place for a while.

Arendelle, huh? I heard about the huge snowstorm here.

As he saw the kingdom in view, the white-haired Guardian started to descend, hoping something interesting was there.

"Where do you think the honeymoon should be, Elsa?" Anna asked as she was lounging on Elsa's bed, flipping through a wedding magazine she had found at a store.

"Honestly, Anna, I think that's something you need to talk to Kristoff about." Elsa yelled, currently rearranging her closet. Even though her over the shoulder gown was her favorite outfit in the world, Elsa still had other dresses and gowns she'd liked to wear from time to time. "I mean, you guys have been together for three years now, I'm sure you guys will come up with something."

"Do you think we should try for a baby?" Anna continued to ask, not really paying attention to Elsa.

Elsa sighed heavily and popped her head out her closet door to make sure her younger sister would actually hear her. "Anna, go plan a date with Kristoff, and talk to him about it. I'm not going to decide if you want to have unprotected sex during your honeymoon or not... which you shouldn't, by the way."

Anna giggled and jumped off her elder sister's bed, leaning on the bed post. "I got it, I got it. What are you going to do while I'm gone?"

"I'll be out in the front, trying to see what else I can do with my powers."

"Don't freeze the guards, now."

Elsa's face stiffened a little. "That's not funny, Anna. Now open the window for me, it's stuffy in here."

Anna got up and unlatched the window, letting in the cool, summer breeze. "I know, I'm sorry, Elsa. I won't make that kind of joke again."

Yeah, she will.

Elsa just sighed as Anna walked out. "Give Kristoff my regards, Anna!"

"Got it!"

Elsa went back to sorting out her closet. It's been a while since she's seen some of the clothes in there, let alone organize the gigantic walk-in room. She started to hum random notes to whatever she saw fit, and continued to pick and hang up thousands of clothes. The strangest thing happened then. Elsa didn't know why, but she suddenly got the feeling she was being... watched.

Jack somehow found a lovely girl sitting on a bed, reading a magazine for weddings. The mischievous boy could only roll his eyes, being the immature kid he was; plus, Jack thought weddings were pretty pointless.

All you do is sit in a chair for a couple of hours and see a couple kiss. And then you eat. And then you go home. Yeah, weddings are a blast!

Suddenly she started to talking, but no one else was in the room.

Is this girl crazy?

Seriously, this was the girl everyone talked about? A mundane girl who talks to herself? What a downer. Just as Jack was about to ditch the place, another girl appeared. Soon, Jack's attention came back to the scene. The other girl standing was a lot prettier. Her loose braid went well with her face structure, and her eyes were an icy blue, kind of like his. Her gown was gorgeous, and one can only wonder how it was made. To put it simply, Jack thought she was more than pretty; she was beautiful. Jack continued to watch the girls talk, and then the brunette decided to open the window.

Hmm that was kind of her.

Now, Jack wasn't a pervert, so he would never go into a girl's room without permission. But he just wanted to hear the girl's voice. So, he swiftly entered the room, making sure he didn't leave any traces such as snowflakes or frost behind.

"Give Kristoff my regards, Anna!"

"Got it!"

Just as Jack suspected; smooth and composed, just like the way she looks. He could also assume that the perky brunette was her sister, but judging by appearance, the blonde one looked older. How old she is was a mystery to the guardian, but it's not like age really mattered to him, he was forever in a seventeen year-old body (and sometimes mentality) but in actuality, he's more than three hundred years old.

Jack just continued to stare at the girl with the beautiful gown walking in and out of her closet. And while usually he would find it boring after another five minutes, Jack couldn't help but stay and observe her. Something about her just captivated him.

Elsa sighed and basked in the glorious feeling of accomplishing the impossible. She looked at her closet and found herself smiling with pride. Every dress was organized by color, and the shoes lined up below were organized by height. Well, I guess a little food will suffice as a reward!

Elsa got her hands ready for her trip to the kitchen, hoping she wouldn't screw up this time around. Blue orbs started to materialize from her palms, and light blue beams shot through, leaving a trail of thin ice. Well, here goes nothing.

Slowly, Elsa stepped on, and slid her way down, hoping the mysterious feeling of being watched didn't follow her.

Jack followed her. He expected to her to be the one that created the snowstorm three years ago, not her sister. He was fairly impressed by the girl's skills, but when it came down to it, Jack still preferred his own. As the girl slid down, the trail of ice didn't melt, but disappeared behind her.

Impressive. But he thought too soon when the petite girl— well, she really wasn't a girl. She was a full-fledged woman, but Jack thought it would be more appropriate to call her a girl— slipped on the railing on the staircase just before the end and fell. Jack chuckled a little and went to go see if she was okay. For the first time since he got there, his feet touched the smooth, wooden surface of the castle. He was about to bend down to see if the girl was injured, but before he could, she slowly rose up and stayed on her knees.

"Ugh..." she moaned as she rubbed her cheek, "maybe I should just take the stairs next time instead of the railing."

Jack thought this was a good time to maybe introduce himself. He didn't know why he should, he just did. In front of the girl, Jack materialized the word, "hi" out of ice. Jack thought she wouldn't see it, but he thought wrong.

Elsa gasped and jumped back a little. She didn't know if it was her or her powers, but the word just appeared out of nowhere. Did I do that? What am I saying, of course I did that! Who else has the power to control ice?! But why "hi"? Was she pretending to be the person she thought was watching her? She decided to play along with the words and spoke, "Hi there."

Jack was a little shocked at the fact she actually replied. He thought she would just freak out and walk away... well, he got the first half right. But since she's going along, might as well talk to her.

I'm Jack. He began to write, what's your name?

"E-Elsa..."

"Elsa..." Jack said. The name slid out smoothly out of his lips when he said it. How beautiful.

It seems that everything about this girl was beautiful, and it was sad to Jack that she couldn't see him. Oh well, maybe it's for the best. For now, let's just talk to her like this.

Nice to meet you, Elsa.

"Um, before we continue, can I ask something?"

Jack cocked his head to one side in confusion. Sure, what is it?

"This isn't my doing, right? I mean, my powers aren't making you write this, right?"

Jack chuckled, "This girl is awesome."

No, I'm my own person.

Elsa sighed, but then she was startled again. If she's not the one writing, then who is? Obviously a person named Jack, but… why can't she see him?

As you probably can't see, I have no physical body… but I do, you just can't see me.

"And why is that?"

In due time, Elsa. Jack didn't want Elsa knowing what he looked like just yet. Maybe later on, when he gets caught slacking off his Guardian duties, and he has to go.

"In due time? No time like the present, right?" Elsa made an awkward smile, and shrugged to no one. It felt kind of stupid to be talking to thin air, but someone was out there, watching her. It's not a bad idea to make friends with him, in case he can do something terrible to her.

Haha, I guess. But seriously, not now.

"Hmph." Elsa crossed her arms. This invisible person was really being stubborn. "So tell me, Jack. Who are you, and what do you want with me?"

Jack didn't know quite himself. He just started communicating with her, hoping she wouldn't even bother to see it. Although, he really needed another friend besides Jamie and the other Guardians.

I just wanted someone to hang out with.

Elsa scoffed, "How old are you, ten?"

More like three hundred, but close enough.

"A three hundred year old spirit wanting a friend. Ha, wait until Anna hears this one."

Trust me, I'm much better looking than I sound.

Elsa smirked, "I'll believe it when I see it."

It was Jack's turn to scoff. This girl had a lot more sass than he thought, and it kind of pissed him off.

I know about the incident, three years ago.

Elsa's smirk dropped. "Y-You know?"

With a heavy sigh, Jack tried to think of what to say to fix things. He honestly didn't mean to bring up her past, especially something as huge as this. "Damn it, Jack. Why do you do this to yourself?" before he could fix his mistake, Elsa spoke.

"Well, it's okay. It's in the past now. I have more control over my powers now."

I'm sorry.

Elsa smiled. "Don't be. So, what do you want to do?"

Jack smirked.

Wanna build a snowman?

The snow queen just giggled as she set up the empty hall with snow. She blasted the stairway with snow, and buried the floor with even more snow. Jack held up her staff and a light blue beam shot through, creating a steady, gentle snowfall.

Elsa looked up in amazement, "That was you, wasn't it?"

The snow was getting carved into letters, Jack's new way of communication. Eh, it's nothing.

Elsa could only roll her eyes at the comment, "Show off."

Jack chuckled and blew a small snowball in his hand. He started to roll the snowball around on the snow-covered ground and eventually created a bigger-than-normal base for the snowman (or woman, whichever.)

Your turn.

The once grown-up woman gave into her childish behavior and began to create a snowball of her own. She started to swirl her hands around, and gradually started to separate them as the ball in the middle got bigger. As soon as she got the right size, Elsa levitated the ginormous snowball onto the base that Jack created. They continued to take turns, making the snowman bigger than it should've been. The next thing they knew, the head was already touching the ceiling. Somehow, Elsa gradually started to create a staircase to get up, and she found herself looking down.

"Yikes, that's a long way to go…" She jumped, creating a spiral ice slide in the process. Elsa knew she could've just made the slide first, or even head down the steps, but she thought it was more fun to create while doing. Jack flew down with her, having too much fun with his new friend than he should, even if she couldn't see him. They both laughed together unknowingly and dove into the powdered floor, laying on the ground next to each other. Elsa didn't really know how, but she could feel a slight presence next to her; almost like she can tell a person was there. Both of them agreed that the snow had worn them out, so Elsa "melted" everything, reverting the winter wonderland back to its boring, empty state. Still getting used to the fact that no one is physically there, Elsa rolled on to her stomach and stared at the ground.

"So, Jack. Tell me about yourself."

Jack got up and floated above Elsa. It was easier to write where she could read properly, instead of trying to write upside down.

Well, what do you want to know?

"How did you get here, and why?"

Here as in the castle, or here as in Arendelle?

"Both, I guess."

I flew here. I was assigned to watch around the world to see if anything was going wrong.

"Mhmm, and getting into the castle?"

Your sister opened the window.

Elsa giggled, "Wait, so you just barged into a girl's room without permission?"

It's not like you guys were undressing or anything…

"That's still a violation."

I guess.

The queen laid her cheek into her hand, slightly disappointed by the lack of response she got, "That's it?" she jokingly said, "You're not going to even apologize?"

Well if I did, that means I would be sorry for meeting you.

Elsa blushed a little. This spirit was nice, and it was a nice break from Anna and Kristoff. She loved them both to death, but she always hated feeling like the third wheel between the two. "So explain to me, again, why you can't show yourself?"

Jack scratched the back of his head for the answer. It was a bit complicated to explain that he was a mystical creature that no one really believed in, and the only way to see him was to believe him. But couldn't he just ask her to believe in him? That's not breaking any rules, is it? Jamie can still see him, why can't he make Elsa see him, too?

"Jack? Are you still here?"

Yeah.

"Is it too complicated to answer?"

Yeah.

"You don't have to explain it to me, if you don't want to."

It's not that I don't… It's just…

Jack sighed heavily. He really wanted to tell her.

On the other hand, Elsa was worried she might have pushed Jack a little too much. She knew Jack didn't want to reveal himself immediately, but she really wanted to see him. Elsa wanted a friend to talk to and hang out with, and not third wheel with her sister. But if he didn't want to show himself, then Elsa should just respect that.

"It's okay, Jack. I understand."

Elsa…

"No, really, I get it. I'm sorry I pushed you."

You didn't mean to.

Elsa sighed. Was it silly she was growing a bit fond of something that wasn't really there? She had a feeling if Anna saw what was going on, she'd think she was a crazy fool (and somewhat of a hypocrite, since she got on her case with the whole 'you can't love someone you just met' thing.) But if Elsa was really being honest, she didn't want Jack to go away. It sucks to be lonely for almost thirteen years in a room, isolating yourself from other people. And even though everyone has accepted Elsa the way she is, she still doesn't really have anyone to talk to but her sister.

Jack was feeling the same way. The Guardians and Jamie are all amazing to be around with, but he really needed someone else to talk to, and ranting to mythical Guardians and a thirteen year old boy wasn't really going to cut it for him. He liked Elsa, and he was really getting the feeling she liked him back. But you can't love someone after just meeting them, right?

"Jack!"

Jack's train of thought was lost when he heard that familiar voice.

"Tooth?" He didn't believe it, but soon enough, there was the tooth queen, feathers and all, "what're you doing here?"

"Bunnymund sent me to find you. Honestly, you'd think he could do it with those portals of his…"

Jack chuckled, "I'll be there soon. I just…" he turned back to see Elsa. She was laying her head on her arm, almost as if she was lost in thought, "I just need to take care of something here, okay? I'll be there soon, I promise."

The hummingbird hybrid just shrugged, not bothering to question Jack's motive, "Just make sure you get back within a certain amount of time. I need to get back to my job as queen."

"Will do. Tell Baby Tooth I said hi." With a quick nod, Toothiana flew off, hastily returning to her job.

Jack looked back to Elsa. Now is probably a good time. He tightened his grip on his staff and began to write.

Elsa…

The queen lifted her head, noticing the frosted letters that lay in front of her. "Yeah?"

Do you… do you believe in mythical creatures?

Elsa lifted an eyebrow up, "What, you mean like unicorns and all that?"

Well, kind of.

"Um, since trolls live around here, I guess. Why?"

Do you know Jack Frost?

"Of course not. No one believes in…" before Elsa could finish her sentence, it hit her. The spirit she was talking to was named Jack, and he has the power to create snow and ice. Was Elsa really this naïve?

"You have got to be kidding me…"

Listen, Elsa. I know it sounds ridiculous, but I am Jack Frost. Now, I have a favor to ask.

Elsa got up on her knees, still dumbfounded by what Jack just told her, "Um, sure."

Close your eyes, and just… believe in me. Please?

Elsa was still skeptical, but she found herself closing her eyes anyways. She tried to picture what Jack might look like, and how old or young he must look. She tried to imagine his voice, and the color of his eyes, and maybe even the color of his hair. Before she knew it, Elsa was creating a whole image of Jack. The next thing she knew, she felt something lightly pressing down on her shoulder.

"Can you hear me, Elsa?"

The young queen's eyes opened, and saw a young boy with frosty white hair in front of him. His skin was unnaturally pale, and his eyes were a light blue, almost like ice. He wore a blue hoodie with some frost on top, and he had on some sort of khaki colored pants. Elsa couldn't help but smile. He was right; he was better looking than he sounded.

"Jack Frost. Here, live in the flesh."

The boy smirked, "The one and only."

They both laughed lightly and after, they just talked for a bit. Jack explained who the guardians were, and how the whole thing worked, and Elsa told the story of how she froze Arendelle. Finally, Jack was the one to call it a day.

"Toothiana called me over before you saw me. I need to start heading back."

Elsa pouted, sad that her new friend had to go, "You'll come and visit, right?"

Jack patted the childish queen's head with a smile, and a simple, "Of course."

Elsa suddenly broke into a smile and wrapped her arms around Jack. Even if they only hung out for a short while, it was nice to know he won't be gone forever.

"Just promise me you won't stop believing in me… I would hate it to show up and you wouldn't be able to see me again."

"I would never stop believing in you."

They looked into each other's eyes for a minute, and then, without thinking, Elsa pecked Jack's cheek with a light kiss. Jack felt his face heat up, and that's when he knew he had to go. They both headed back to Elsa's room, where Jack could leave through the window he once came in.

Jack stood on the ledge of the window, getting ready to leave his new friend. "I'll be back soon."

"I'll be waiting."

With that final statement, Jack flew off, not leaving his sight off of Elsa. When she became too small to, that's when he turned around and started to fly back to his fellow guardian members.

Elsa stood there, watching Jack distance himself from her. She knew he'd be back, and maybe she could even introduce him to Anna properly. When Jack finally left her sight, she headed back downstairs, remembering the real reason she went down in the first place. She went into the kitchen and grabbed a few pieces of chocolate.

"Elsa?"

Looks like Anna's back.

The older blonde went to go greet her sister, and asked how her date with Kristoff went.

"It was good," the younger one said, stealing a piece of chocolate from her, "we got most of the plans done, which is good."

"That's good to know."

"Yeah." They both headed to Elsa's room, once again. Anna didn't know why, but she found her older sister's bed to be extremely comfortable, "So, what did you do today?"

Elsa just shrugged, but in her mind she was smiling from ear to ear.

"Oh, nothing. Just got together with a friend."

A/N: I hope you all enjoyed it ; w ; reviews and favors would be awesome, so if you liked it, please feel free to do either one :)

Until next time my lovelies~