AN: So, here's the deal. I know I have other things to be working on..but I have to do this idea. It's been bothering me for a few days now. I just am now getting around to it, finally having a bit of downtime from planning things and figuring out what I'm going to do for this girl's night party thing tomorrow. And thanks to Rise of the Guardians, I found a theme that I could do with my very limited wardrobe. We're supposed to dress in what we find 'beautiful'. Which is a challenge, because I don't go for beauty, I go for trouble more often than not with how I dress and do my makeup. A friend of mine told me after we watched the movie and I told them about the girl's night to go with a frost theme, because I am able to do that with my wardrobe and makeup area. The sad thing? I got outsmarted by freaking eyeshadow today. I was running on too little sleep to figure it out. But, I have a theme, and I know what I'm going to do for tomorrow now. So I can focus on my writing for now.

Anyways..yeah, first cross-over. I'm hoping to do more, if I like them.

So, I hope you enjoy. If there's something that I don't get right that's bothering you and isn't important to what I'm doing with this, then let me know and I'll fix it.

Enjoy!

Jack frowned, sitting on a branch outside, watching kids below play in the snow that he had managed to produce. He knew he had to be getting back to the Pole. He'd already stuck around too long after finishing his job. As such, he pushed himself up and took off. As much as he wanted to join in the fun, he couldn't today. North had already told him he only had a few days left before he had to go to some school due to them needing to keep the youngest of the Guardians safe from something. They never said what.

He hadn't fought back too hard. He was too preoccupied with something that Jamie had told him not long ago, something that he was still trying to understand.

Bunny had rolled his eyes when Jack had asked them if they understood it, telling the frost child that he didn't need to get so attached to a kid.

Jack had shot back one of his normal comments and had walked away.

The day after that, he'd been drug out shopping in some odd alley. Jack had only barely contained his urge to make a mess of things there. Because, honestly, when presented with a new world, what better way to enter than to enter using mischief? But North kept him from doing so.

Jack spent the night before he was to leave for the school looking at the things he had had to get. The most distainful to him? The wand. He wasn't trading his staff in, dang it! He refused to! But it had been worked out so that Jack could keep the staff with him. But he still had to use the freaking wand. The boy scowled, but let it go. He'd already fought back against the shoes idea, and had decided he'd do what he had to to get there, then he was playing by his rules.

The following morning, the other Guardians walked with him to the station, the platform, to see him off. They all promised to write to him, even Bunny.

Tooth had wanted to send Baby Tooth with him, but Jack had frowned. "She'll get lost or hurt. You know how some kids are. Keep her with you, I don't want her to get hurt."

That had ended arguments on that topic, and Tooth told Jack that she would send letters with Baby Tooth, a compromise. Nobody argued against it.

When the warning whistle blew, Jack frowned and waved goodbye to those he considered his family. North had helped him load his things, so he gave them one last searching look before getting on board. He didn't move until they were out of sight, then he went in search of a compartment. To his luck, he found an empty one, and as soon as he sat down, the shoes had had wore were discarded. He felt better now.

He looked around, frowning as he decided what to do.

Before he could do more than frost the window over and start drawing designs there, the compartment door slid open, making him look over curiously.

A couple of people stood there, and Jack recognised one of them. His eyes narrowed and one side of his mouth pulled up into a half-grin. "Jamie?"he asked, surprise leaking into his voice.

The brown-haired boy looked up curiously. His eyes widened before he grinned and launched himself at the frost child. "Jack! What're you doing here!"

The blond girl smiled slightly, having a slightly dreamy air about her, and entered, taking a seat. She knew Jamie wasn't leaving now.

Jack laughed. "I was wondering where you were off to a few days ago. I stopped by, but you weren't there."he said. "This is what you've been doing with your winters? Spending them at some school?! Blasphemy!"

With that, Jack caught Jamie in a headlock and ruffled the boy's hair, leaving a sheer trail of frost. When the boy shivered, Jack released him. "Sorry, Jamie."he said, frowning.

Jamie rolled his eyes, then smiled up at the blond. "Jack, this is Luna. Luna, this is Jack,"

Luna looked at the frost child before she looked at the window, the frost design there and smiled. "The spirit of Winter."she remarked.

Both boys gave her a surprised look, but Jack glanced at the window and frowned. "Right. Mind keeping that secret? I wasn't supposed to let anyone know."

Luna nodded and returned her focus to the thin magazine in her lap.

Not much more was said on the way.

Jack figured out that Luna was a Ravenclaw and Jamie was a Gryffindor, both fourth years while Jack himself was going to be a fifth year.

As soon as they reached the school, Jack got a stern look from the woman who stopped the three for having no shoes on.

Jack looked down at his feet before he looked back up and gave a faint smile.

Jamie bit back his laughter at the look in his friend's eyes.

Jack was led away from Jamie, taken to a side room nearby while Jamie and Luna went to find seats in the Great Hall.

The Winter child came through not long after that to take a seat with Jamie. "What's her deal?"he asked, looking highly disgruntled. "It's not like I broke any rules. Yet."

A pair of twins looked over at this, but said nothing.

Jamie shook his head. "She's just stern. You'll do good to stay on her good side this year, Jack. Please, just don't cause trouble in her class. On purpose, at least."

Jack frowned, but nodded. "Fine, but the rest is fair game,"he warned.

"Of course."

And, yeah, my characterization probably highly bites, but I'm trying.