Yeah, I know I haven't explained how Jack can understand the fairies, and if someone really wants me to, I'll attempt to come up with a reason why he can, but if not, just go with the flow and embrace the magic?!
And for Jack's little sisters name, two faves amongst us fans are Pippa (due to the voice actors) and Jamie (because of the resemblance) But I'm going to go for Janie, because I think it's cute and yeah...

So, this is a little different, as some of it will be from Baby Tooth's point of view, which I am hoping to be able to get right... And what she says will be in italics, as I will have... Translated it all for you *grins bright, disarming smile*
Anyway, angst, sadness, memories, friendship and crying fairies await you... So dive in!
Set a couple of weeks after the Easter Fic :D

Oh, and hugs to everyone, as usual :D

Baby Tooth was chattering away to herself as she sorted through the teeth. Molar here, another one there... oh, a first tooth! She coo'ed over it for a moment, before gently placing it into a container.
She was still flitting around when Jack flew in, having been there to see Tooth and wanting to say hi before he left, and squealed in delight as she caught sight of him.
"Jack!"
He laughed as she snuggled into his neck, and held out a hand for her to land on.
"Hey BT, how's it going?"
"Good... Same as normal. Where have you been?"
"Sorry, I've had a hell of a time trying to control the avalanches with the recent ice and tremors... And had to go to Burgess. Ah well, they've cleared up now, so I'll be seeing you more often." He gave her a bright smile, and she sighed at the whiteness of his teeth...
"Good... What is it?"
Jack blinked, having been staring at something on her face, and she brought her hand to the birthmark there.
"Sorry, I was just... nothing. Sorry BT, I'm gonna have to get going. If I stay here any longer, I'll end up melting." He grinned again, his usual twinkle back in his eyes, and she gave him another hug.
"Okay... Come see me again soon?"
"Course I will. What's Peter Pan without Tinkerbell?"
She thought for a moment.
"... Hopeless as any other male?"
"Hey!" He exclaimed, the undercurrent of laughter taking any sting away from his words, "I'll have you know I'm perfectly mature, responsible and-"
"Modest?"She finished, not managing to keep serious, and he crossed his arms, raising one of his eyebrows.
"Oh, now that's unnecessary..."
They bantered for a small while, until Jack got himself playfully shoved towards the door, and grinned.
"Okay, I'm going. Take care of yourself BT!"
With that, he was gone and she sighed, smiling.
"Now... where was that first Tooth?"

She had just slotted the small box into its own snug home, when Tooth came flying in, smiling.
"Hey Sweetie, Guess what!? Jack found some pictures and drawings of his family, and showed me... Here, look!"
She held out the printouts, that Jamie had found as a surprise for Jack, slowly flipping through them, and Baby Tooth smiled as she saw the human Jack, laughing with his sister...
Then she blinked, stopping Tooth from going to the next one by slamming her tiny hand down, and looked closer at the young girl... More specifically, at the birthmark on her face.
Tooth must have noticed too, and blinked.
"Oh... Look at that! You have the same- Baby Tooth! What's the matter sweetie?"
Baby Tooth just mumbled something about having somewhere to be and quickly flew out. But not before Tooth heard a small sniffle.
She looked back down at the pictures again, and gasped as something clicked.
Oh... Baby Tooth didn't think Jack was using her as a replacement for his sister? She couldn't think that... Right?
But why else would she fly off like that?
Tooth carefully wrapped the photos up again and flew from the room, quickly placing the pictures on the small desk she had and flying towards the pole. She needed to ask Jack to speak with Baby Tooth, and it was the first place anyone would look for him.

Luckily for her, she managed to catch him before half an hour was up, and he smiled at her, concern evident.
"Tooth? Is everything okay?"
"Jack... Baby Tooth was looking at the pictures you showed me, and she saw a picture of your sister and-"
"Oh..." He understood immediately. "She saw the birthmark didn't she...?"
"Yeah... I think she thinks you're using her as a replacement for your sister..."
"B-But I'm not... Why would she think... That's not what-"
"I know Sweet Tooth, I know you wouldn't do that, but she doesn't... Can you go speak with her?"
"Of course! Is she still at the palace?"
"She was last time I checked..."
"Okay then. The snow can wait..."
They both flew back to the palace, and Tooth asked around for Baby Tooth, only to find she had gone on a tooth gathering trip, alone, which was both dangerous and against the rules, seeing as they were meant to go in pairs...
Jack, not wanting to waste time, decided to follow her usual route, and Tooth promised to keep Baby Tooth at the palace if she returned before he got back.
Jack flew out, following Baby Tooth's normal route, and hoped he could catch her before either she got into trouble or he hit the warmer parts of Asia... He wasn't feeling too good as it was.
_

Baby Tooth was hardly concentrating on the Teeth, mindlessly completing the tasks she had done countless times before, and she sniffled.
It had been the birthmark Jack was looking at earlier... So was he just using her to replace his sister? Using her to keep something from his past? He must be. She was so stupid.
Why would Jack Frost, of all people, want to be friends with a stupid little fairy like her? The whole idea was ridiculous... He only wanted to be friends with her so he could remember his sister...
Baby Tooth wiped her eyes, where tiny tears were starting to pool in her eyes.
Why was she crying? She'd always wondered why Jack was so nice to her. Why he took the time to help her and talk to her and joke with her... She sniffled again as she took the small snowflake necklace from around neck, holding it in her tiny palms.
She bet even that was just something stupid... stupid birthmark... stupid fairy...
Baby Tooth sniffled again, tucking it back away as she continued towards the even hotter part of Brazil, unaware of the winter spirit that was trying to catch up with her.

Jack was cursing as he tore off his hoody, tying it around his waist. Even topless, it was really hot, and he was flying higher to keep cooler. He just hoped he could find Baby Tooth before she got somewhere ridiculously hot, like Brazil...
It was almost another half hour before he caught sight of a tell tale line of sparkles, and sighed in relief, thankful that it was night and not the middle of the day. If it had been, he probably wouldn't have even got this far...
"Baby Tooth! BT, can I talk to you for a minute?"
His voice carried, and he knew she had heard it, but she only slowed down a little.
He flew lower, and yelped as the steep descent took him out of the cool and through what seemed to be a wall of heat. It took a while for him to adjust his breathing, but he eventually managed it and looked up to see Baby Tooth flying towards him.

Baby Tooth blinked at Jacks voice, and choked back a sob.
He was only here because Tooth told him to come... Why else would he be here? None-the-less, she slowed down. Then she belatedly realised that it was far too hot here, for Jack anyway, and turned to see him stumble in the air as the heat struck him properly.
She immediately flew towards him, and sighed in relief as he got his breathing steady, before blinking, remembering why he was here.
"What do you want? It was silly to come here... It's too hot-"
"Well, I needed to find you... Not my fault you're so fast..." He tried to grin, but it stumbled. "Can we go a bit higher?"
She floated upwards, and Jack sighed as he faced her, now slightly more comfortable.
"What's wrong BT? Tooth said you were upset?"
There... Of course Tooth sent him...
"Nothing..."
"Is it the birthmark? Because I- Baby Tooth! Wait a minute! Tell me you don't think I'm trying to use you to replace me sister?"
He looked pained, hurt when he said it, and Baby Tooth sniffled again.
"You mean you aren't?"
"What? No! No, of course not!"
"But... But you were looking at the mark earlier, and why would you be friends with me anyway? I'm only a stupid fairy and-"
"What? No you aren't? Where's all this come from? I was looking at the mark because... look, I had just seen those pictures and it made me a little... I was just thinking back to what I can remember... The last time I saw her and... I didn't mean to hurt you Baby Tooth, I just miss them a little sometimes, and I was upset."
"Oh..." Now Baby Tooth felt more guilty than anything, and the tears finally pooled over. She had gone flying off like some newbie fairy, feeling all sorry for herself, and had dragged Jack nearly to the equator because she was paranoid at the fact that he missed his family?
She felt a cold hand beneath her and fluttered into it, looking up to see Jack looking both startled and worried.
"Hey, shh... It's okay. You're okay. I'm sorry BT, I never meant to make you upset."
A finger beneath her chin had her looking up to see a familiar twinkle, but an uncharacteristic seriousness in the guardians eyes. "Listen, for a minute?"
She gave a trembling nod.
"Right, I'm not using you to replace my sister, okay? I never have nor am I ever going to use you like that. I didn't even pay that much attention to the mark before today... I hang around with you because I care about you. Because you are the most cheerful, fun loving, carefree little sprite I know, and because you're my friend... Actually, I like to think of you as family. I look at you and see you. You, BT, not my sister... I might miss her, but you're my family now. Yes, I think of you as my little sister, but not as a replacement for Janie... Not as Jackson Overland Frost's little sister, but as Jack Frost's sister... Do you understand?"
She nodded, stunned by how much he had opened up to her, and how much he actually cared, and she smiled.
"I understand..."
"And do you believe me?"
She smiled, wiping the last of the tears away, and saw nothing but truth and love in his eyes.
"Yes... I'm sorry-"
"For what? It was my fault... But let's just forget about all of it, eh?"
She nodded, jumping into the air and snuggling into his neck.
"Yeah..."
"Okay then... Now, how about we get you home, eh li'l sis?"
"Okay. And maybe before you melt?"
He laughed.
"Sounds good to me, Tinkerbell. Let's get back..."

By the time they arrived at the Palace, Jack had gone way past the headache stage, and knew he needed to get to some snow, but he wanted to get Baby Tooth back first.
The little fairy had become increasingly worried about the winter spirit, and flew ahead as they reached the palace to get Tooth.
Tooth gasped as she saw the state of him, but Jack gave her a smile, face starting to flush an unhealthy pink.
"Don't worry, I'll be fine. I just wanted to-to make Baby Tooth got back okay... I'll head off... now..."
He gave them a weak smile, and Tooth immediately flitted to his side.
"Come on Sweet Tooth, we've got to get you somewhere cold..."
It wasn't long, with the help of both a very worried wind and a very worried Toothiana, before Jack was able to sink into the snow of a mountain range.
"Thanks... I'll be fine now Tooth."
"You're sure Jack?
"Yeah... And you've got to head back to the palace..."
She nodded, realising that Jack would be fine, and hugged him, before turning away, only to turn back as he spoke her name.
"Tooth?"
He was sat up now, and the flush had gone from his face, leaving only a faint purple tinge.
"Yeah?"
"Please don't say anything to Baby Tooth... She was really upset about the whole thing and-"
"Of course I won't, Jack. I'll need to speak with her about going off alone but-"
"Okay..."
"And I want you to go to the pole and spend the night. No arguments, Jack, I just want to know you'll be okay."
He gave her an eye-roll, but grinned.
"Okay... I'll come down in a couple of days...?"
"Okay Sweet Tooth, I'll see you then."
She gave him another quick hug and took off, leaving Jack to lay in the snow for another half hour before letting the wind carry him to Santoff Claussen.
Maybe it would be a good idea to stay there for the night... He hadn't annoyed Phil in some time yet, after all.

Tooth arrived back, to find a very worried Baby Tooth.
"Jack's okay. And he asked me not to ask about what happened. But that doesn't mean I can't speak to you about the rest of it." Tooth sighed. "Flying off alone was irresponsible Baby Tooth. Not to mention dangerous. What if something had happened to you? And what about Jack? He could have been badly hurt if he stayed in that heat any longer... I'm not going to ask how close to the equator you got, because I'm not sure I want to know." She sighed again, as Baby Tooth apologised, and shook her head. "Just think things through a little more in future, okay BT?" The nickname had kinda stuck after Jack started using it, and the smaller fairy nodded.
"Good. Then let's get back to work. I heard you had a first tooth earlier?"
Baby Tooth flitted away and Tooth followed her, smiling.
Time for everything to get back to normal.
_

Later that night, Baby Tooth yawned as she fluttered down to her bed.
Just before she dozed off, she looked at the small snowflake crystal Jack had given her and smiled, as she kept it clutched in her tiny hand, eyes closing of their own accord.
She'd always wondered what it felt like to have an older brother.
Now she knew...

So, love it? Hate it? Want more from the lesser explored characters, like maybe Phil's POV or something? Or one of the elves? (That may be... both interesting and a challenge...) Not my best chapter, but I'm hoping the next one-which may in fact be my fave so far- will make up for it :D
Whatever it is, please review and let me know!

Oh, and the plea for Pranks for the April Fool chapter is still there! Please?!
*huge puppy eyes...Then resorts to Jedi mind tricks* You will awaken the part of your mind that likes to be evil... you will... ahem, right. *realises that probably isn't the best way to get you guys to help,and smiles disarmingly*
What? You all love adorable puppies...?
*rolls eyes and resorts to Puppy eyes again.*

Till next time then guys, Raven xx

Oh, and I'll do you guys a deal. If I can get ten pranks to use, I'll upload a third fic today :D Or maybe two or three tomorrow, depending :D
See? You've even got me resorting to underhand deals and bargaining *dramatic sigh then sly grin* I approve :D