Beasts Within

Disclaimer: I do not own Naruto or Prince of Tennis. I do not own anything besides the original characters that are included in the fanfic.

All the Jinchuuriki are around 12-15 years old to stay within the middle school category along with the rest of the PoT cast. I know that the ages are wrong; I'm just making them fit into the storyline. All of the canon characters will most likely be OOC considering I can't stay to a certain personality of a canon character no matter what I do. The Jinchuuriki have total control of their Bijuu but can still talk to them whenever. When they release the chakra of their Bijuu they become stronger of course and their voices are a mixture of their voice and the bijuu they contain, therefore 'Demon Enhanced Speaking' when they do activate their powers.

"Chat" Normal talking

'Chat' Thinking

'Chat' Telepathy between Jinchuuriki

"Chat" Demon enhanced speaking

Special thanks to demoncat13 for all your support for the fanfiction!

Tail 26: The Coach and Her Fox

It had nearly been a month since the Akatsuki had showed up at the training camp. The schedule went on as usual until the power went out during a thunderstorm. Everyone was moved inside to the cafeteria. All of the tennis players were forced to help move the tables against the walls in order to create a big space in the middle of the room.

Estrella came into the room with candles as well as lighters and some lamps. Yuki followed close behind with a bag trailing behind her attached to her neck by a bandana.

Everyone could have sworn that the fox had a smile on her face as she walked over to Coach Sakaki and gently dragged the bag out in front of him. Sakaki nodded towards Estrella for all the lights before handing something to each of the regulars. They decided to use the tables as stations to put the lights until the storm passed through.

A few minutes passed before a lightning bolt struck through the sky and lit up the room. The few people that were scared of thunder and lightning jumped before huddling together. Those that were included were Ryoma, Naruto, Fu, Kirihara, Kikumaru, Choutarou, and a few more people that seemed to be the baby of the group.

When the teams tried to calm down their respective teammate, they never noticed one hiding under the tables.

A few more lightning bolts flashed with thunder rolling in. Everyone was trying to calm down the trembling boys except for one.

This one was looking around for something until she saw something bolting outside the room. Looking towards the group, Estrella quickly snuck outside without being seen. She walked towards the farthest window in the hallway to search for something…or someone. She kept walking until she reached the window and saw someone under the bench.

Smiling gently, Estrella stretched out her hand towards the child and said, "Come on girl. No need to be scared of a little thunder now right?"

She saw the girl look up with a small glare before slowly crawling out from under the bench and grip her hand tightly as another lightning bolt flashed outside. The girl jumped into the coach's arms, and her figure shook.

"It'll be alright girl," Estrella said while gently soothing the girl by rubbing circles on her back and patting her hair.

Inside the room, the other coaches couldn't help but wonder where Estrella was. They couldn't leave their teams though, so they weren't able to go out and check to see where Estrella had gone in this storm.

No sooner had they thought that, the door opened and in came Estrella. The others wondered where her fox was, so they missed the shadow that slipped past the female coach and up onto the ceiling away from any light that could get in from both the candles and lamps or the lightning flashes.

"Sorry everyone," Estrella said with a sheepish grin. "I was looking for Yuki, but I had no luck. The little one sure likes to run during a storm," she explained while rubbing the back of her head with her hand. Nobody saw the quick glance Estrella did at the ceiling before the female coach walked over to talk with the other coaches.

"I hope this storm ends soon," Kikumaru said with a small frown on his face as he looked out towards the window.

"I hope so too," Yukimura commented while patting Kirihara's hair.

The lights suddenly came back on and everyone jumped in surprise. "Thank goodness," they heard someone yell from above them.

Everyone looked up to see a shadowed blur rush past them and out of the room quickly. Estrella had her eyes wide open and quickly took a look out the window. The storm was starting to move away from them which caused the lightning to stop flashing and the thunder to stop rumbling. The power must have come back on as soon as the storm was far enough away.

"What was that?" Yugito asked blinking in confusion at the now open door the blur used to escape.

Turning towards the others, Yugito looked to see the others shrugging. The Nibi Jinchuuriki stood up and inclined her head towards the door.

Understanding her message, the tennis regulars as well as the other Jinchuuriki went out the door without being noticed by the coaches which was surprising. They all walked down the hallway towards the door to the training lobby. They could hear a machine running and went inside.

The entire group was surprised at what they saw. They saw one of the treadmills moving at a very fast speed. They weren't surprised by the working treadmill however. They were surprised at who was training.

Looking down at the runner, they saw white. They saw a white-coat as well as four paws that were moving very quickly. The treadmill kept going faster and faster until it was going at its maximum speed which would be considered a sprint by the regulars' standards.

Yuki was on the treadmill and doing fine. She didn't look as if she was sweating because of her fur. The group of humans watched as Yuki kept sprinting for about a half hour before jumping up onto the treadmill panel to stop the machine.

Shaking around, Yuki got rid of the small sweat on her body and started stretching her limbs from the long running training. Yuki jumped off the treadmill panel and onto the ground. She landed with her knees bent to avoid hurting them too much from the landing. She shook her head and trotted behind the treadmill she had used.

The others looked behind the treadmill to see a little station including a bed, a food bowl, a water bowl, as well as a few dog toys behind the treadmill. Yuki was currently drinking from the water bowl and then dunked her little face into it.

The others were a bit worried until they saw Yuki quickly pull her face out of the water and shook her head. The water splashed a bit onto the small towel by the bed.

What happened next caused everyone to laugh as Yuki's fur was suddenly dry after being wet with water, so it poofed out a bit to make her fur look like it was a lion's mane.

Yuki turned her head at the sound of laughter and was a bit shocked that the others were there and watching her. They must have seen her running on the treadmill with its maximum speed on. Trotting over to the group, Yuki stopped in front of Marui and tilted her head to the side with a little yelp.

Smiling, Marui picked Yuki up into his arms and started smoothing down her fur with his hand. Yuki's fur started to smooth down, and the little fox purred at the attention. After Marui got Yuki's fur to be back to normal, he started scratching behind her ears which got her purring even more. The little fox was starting to relax under the ministrations until she realized something. She quickly hopped out of Marui's grip and walked over to the window and stared out towards the sky.

Everyone else looked out the window to see that the storm had passed after the half hour that they were watching the fox on the treadmill.

"Thank goodness," they all heard someone say from behind them. Turning around, they only saw a silhouette of a person before it disappeared. They missed the small smile that appeared on Yuki's face before the fox hopped down to go to sleep in her little bed.

They all watched Yuki for a few minutes in silence before they heard someone say, "She was at it again huh?"

Turning around quickly, they were surprised when they saw the coaches behind them looking at Yuki. Estrella had a fond smile on her face as she looked at her little fox while the other coaches had their usual expression on.

"She's always running when it comes to a storm," Estrella said walking over to Yuki. She started petting Yuki's head fondly as she explained further. "She hates storms and hopes that running will take her mind off of it. It seems to work as you can tell since she always runs until the storm is over," she said closing her eyes with a smile on her face as she stood back up. "She's cute isn't she?" Estrella asked while looking at the little fox asleep on her bed.

Hanamura looked towards the little fox as well and commented, "The little one is a fast runner if the treadmill has anything to go by," she said while pointing at the amount of miles the treadmill had gone in the last session as well as the maximum speed it had gone to during the session and for how long.

"Impressive for a little one," Coach Sakaki said putting his chin in his hand.

With a giggle, Estrella just remarked, "She loves to run, and she has built up her stamina because of…other reasons…"

"And those reasons would be?" Coach Ryuuzaki said crossing her arms over her chest.

Estrella gave a glare towards the older female coach. Everyone also saw Yuki snap her eyes wide open before they narrowed into a glare at the coach.

"What?" Coach Ryuuzaki said giving a blank stare towards Estrella. "Show some respect for your elders, girl," she said shaking her head.

Estrella and Yuki glanced to each other and then looked back towards Coach Ryuuzaki. They stared at each other for a moment until the lights went out again.

"I thought the storm already passed us!" Marui yelled looking around frantically.

All of the regulars were panicking before they heard the sound of glass breaking. When the lights came back on, everyone could see the broken window and that Estrella and Yuki were both gone…

Rushing over to the window, they saw Estrella land onto the ground with Yuki leaping towards the nearest fence surrounding a court.

They all saw Estrella glance back at them before giving a smirk in their direction. Yuki did that as well but very discreetly as to not get noticed. Afterwards, they both looked ahead and started running away from the camp buildings.

When the two runners reached the forest, they both nodded to each other and ran further into the forest…looks like it was time once again….