Winter brought him back to her. Or had he been the one to bring winter to Arendelle? In any case, there he was, on her balcony as before. Even then, he hadn't changed. Not a single bit.

"Jack!" Elsa exclaimed. "I'm so glad you're back." She caught herself, returning to her usual composed state. But Jack was quick to notice her excitement, and he smiled.

"Come on," he said, holding a hand out to her. "Light show starts in half an hour."

Elsa knew what he meant at once. "But the Aurora usually doesn't appear till 11 PM. We're three hours too-"

"Let's just say," said Jack, interrupting the queen, "that I know someone who can switch it on early. Just for us."

Elsa was ready to doubt him. But just this once, she let it go. "Well, okay. I'll call Anna-"

"Um." Jack said. "I was thinking it would be just you and me, you know?" Even his pale skin couldn't hide the fierce blush making its way up his neck.

Inside, Elsa felt the familiar glowing, candlelight sensation. But outside, she merely smiled.

"Okay," she said. "That's good too."

They flew over her kingdom, the chill wind blowing their snowy hair every which way, making Elsa gasp in delight at her first taste of flight. They made their own frozen patch in the middle of the fjord- his wayward, curling, floral patterns, her angular, geometrical, perfectly symmetrical shapes, integrating in a stunning fusion of order and spontaneity. They sat in the center and tilted their heads up at the starry sky.

"Jack, if this 'friend' of yours doesn't turn on the Northern Lights..." Elsa teased.

"Just be patient," Jack said. "This guy's fairly punctual." At his words, the sky exploded into a stunning miasma of hues, a shimmering sky-ocean of colors both vibrant and subtle, humming as if to an invisible music, pulsing as if to a beat that no one could hear.

Elsa had seen these lights over her kingdom ever since she was a child. But now- next to Jack on this ice floe in the fjord- it felt hugely, oddly, exhilaratingly unique and different.

"The sky's awake," she whispered, and Jack, watching her, watching the colors reflect in her wide, beautiful eyes, watching them stain her pale hair with more colors than he could name, found himself thinking he'd never seen anything more lovely in his life.

When the sky finally darkened, neither of them felt like going back to the palace. They sat, leaning on each other, on their ice floe. Jack broke the silence.

"I can't really place it, but after all those years of flying all over the place...I feel like I belong here."

"I guessed as much," Elsa said evenly. "Arendelle's just about the only place where people can see you. Well, maybe not everyone, but still."

"Can I stay?"

Elsa smiled. "Of course, Jack. In fact, why did you ever want to leave?"

"I dunno, habit? The weird feeling that I had to look for something?" He shrugged. "Guess I found it. At least that's what my heart tells me."

"Then stick with it," she said. "Trust it. The head can be fickle, but the heart is not so easily changed."

Jack beamed. "You're a wise girl, Elsa."

"That's 'your majesty' to you," Elsa replied, laughing. "And I suppose I have to thank you, too." She squeezed his arm. "I'm not lonely anymore."

She was happy, which made Jack happy...but solemn, too, somehow. He looked down at his cold hands, which hadn't changed since he'd risen from the ice nearly two decades ago, suddenly realizing the one thing that drove a wedge between him and his snow queen.

Elsa was in her room, asleep. Jack didn't need sleep. He instead perched on the roof engaged in his favorite pastime- glaring at the moon.

"I don't want to be like this anymore," he said. "I don't want to care this much about people and just watch them grow old and leave me behind. I know Elsa and her family can see me now, and I should be happy, but...it's not the same. It's just not the same." He looked up. "She's a queen with a kingdom to rule. I'm just an invisible boy who doesn't mean anything! I've been this way for years—don't tell me I'll stay like this forever?"

The moon was silent.

Jack growled. "If you won't tell me who I was, then let me decide who to be. Let me be with her properly, let what I do matter. I know there's a reason she can see me again!"

There was no reply for a long while. Just as he was about to turn away, Jack felt the familiar wave of gentle light pulse over him.

All in good time, Jack Frost. Remain with Elsa. You will need her.

"I'll need her? What for?"

You'll see...

Jack sighed, and pulled his hood over his head. Patience.

Here are my terms; have some faith in me

And I'll let you be who you need to be

Life on the moon couldn't be any stranger

Life on the moon wouldn't feel this far away

The life that I knew is through,

And I'm gonna need you more than ever

I'm alone in this crowded room,

It's like life on the moon

(Two people in the middle of a freezing body of water? Sound familiar? 'I'll never let you go, Jack!')