A/N: Well this is the first chapter so I hope that you like it, mind you this is only introducing the characters but chapter 2 will have more action in it! Enjoy!

Disclaimer: I don't own any of the Inuyasha or Harry Potter characters except for my own Nira and Akina Shizuki.

Chapter 1: The Birthday

The sun rose up from behind the mountains, shinning on the glistening white castle. It seemed to glow with purity and power as the sun wrapped its rays around it. As the light bounced off the castle itself, it also caught the reflection of the windows, which made it seem like it had built in diamonds. Through one of the windows, that was luminating light, was Nira Shizuki's room. It was decorated with all kinds of dragon statues and draperies, most unlike a little girl's room.

Nira was lying in her bed canopy with the curtains around it tied to the posts. The sun reached the foot of her bed, traveling up to her peaceful face. The sun warmed her skin and her ears twitched as the rays touched them. She squinted her eyes open, but quickly closed them again as she sat up. She yawned, showing her demon fangs, and stretched like a dog just waking up from a nap. Her tail curled and her claws extended as she ended her stretch.

She rubbed the sleep out of her eyes as she hopped out of bed. She was excited today because this was her day. She was turning 9 years old this year and no one was going to bring her down, not even her two older brothers. She had remembered Inuyasha's birthday in which he had gotten his sword, she admired him as he swung it around like an expert. She could already guess that she would get her weapon tonight because of her two brothers already having theirs.

She quickly looked through her closet and picked out a kimono with black dragons against a white background. She slipped it on and cocked her door open. She looked around the giant hallway to see if her brothers were around. Once the coast was clear she stepped onto the marble floor and shut her door. The hall was big and narrow with tall windows lining it. Where ever there wasn't a window there was a door to an extra room. Nira wasn't sure why this place had so many rooms but she didn't mind, just whole lots of places to play hide and seek in.

She navigated her way to the main entrance and flowed down the stairs. The big, tall double doors greeting her as she turned to her right. She quickly walked through a swinging door and into the dinning room. Just like the rest of the place it was huge! A long table was set in the middle already lined with plates and candleholders. There were two windows and many pictures on the wall of people that Nira didn't know. A fireplace was set just on the other side of the door, and off to the right of it was another door that led to the kitchen.

Nira bounded to an empty chair, the fireplace behind her, and took a seat. She combed her black, red tipped hair with her fingers as an imp came out.

"Good morning me Lady. What can I get you on this special day?" The Imp said with excitement in its voice.

"I will have my favorite breakfast please!" Nira announced while pointing a finger up towards the ceiling.

"Right away me Lady!" The imp chirped as it wrote down something and took off through the door. Nira didn't have to wait long until she had another visitor. Inuyasha came into the room looking half-asleep still. Nira tried her best to hold her giggles in as he came around and sat down next to her.

"Wow Inu-sama you look awful. Did Sesshy-sama wake you up again?" Nira asked as she gave him an evil look. Inuyasha lifted his head a little to look at her, but put it back down with a thud.

"Oh shut up! You know I'm not a morning person!" He stated as he waved a hand at her. Nira only smirked as she looked towards the door that led to the kitchen. Nira was about to ask her older brother something when the door leading out opened again.

"Sesshy-sama!" Nira shouted as he calmly walked through the door. Inuyasha had stolen a glimpse of his brother and gave a little sigh. Sesshoumaru saw Inuyasha's gesture and only smirked at remembering what happened this morning. He rounded the table and took a seat next to his brother.

"Have a rough morning Inuyasha-kun?" Inuyasha glared daggers at his brother, he hated it when Sesshoumaru used that on him.

"Would you stop calling me that! You're degrading me on purpose, I know you are." Inuyasha grumbled as he sat back in his chair, his arms folded.

"Inu-sama! Sesshy-sama is only showing you proper respect. You are younger than him you know." Nira chimed in.

"So what? You have no room to talk, you're younger than all of us." Inuyasha pointed out.

"Hin! At least she doesn't mind when I call her Nira-chan. Bring me my tea." Sesshoumaru answered his brother while placing his order to a waiting imp.

"So? It fits for her! She's a girl! Yeah I'll have my usual." Inuyasha stated trying to make his point while answering the imp.

"Hey! What is that suppose to mean!" Nira piped in as she stared at Inuyasha.

"I mean that that kind of thing is for girls not for boys. Especially not when they use the word of respect to degrade the person instead!" Inuyasha huffed as he directed his words towards his older brother. Sesshoumaru only sat in his chair, eyes closed and listened to Inuyasha.

Soon their orders had arrived and was being placed before them. Inuyasha had soon forgot about the little spat that had gone on, and was now drooling over his plate. Sesshoumaru was calmly sitting still as he picked up his tea to take a sip. Nira was giving Inuyasha a disgusted look as he gulped down his food. Nira soon swallowed hard and tried to ignore the commotion and eat.

"Inuyasha-kun? Isn't today a special day?" Sesshoumaru asked over his brother's noise as he set down his tea. Inuyasha suddenly stopped and looked at his brother. Nira stopped too and looked out of the corner of her eye, she didn't like where this was going. "isn't someone a year older today?" Sesshoumaru asked again, seeing his brother fail to catch the tone in his voice.

Inuyasha soon caught on as he grinned and turned towards his sister. Nira caught on too as her hungry had turned into adrenaline. She could see her oldest brother smirking as her older brother was getting ready to pounce on her. She predicted right and dodged him in time. She then ran for the door but was caught short and fell to the floor.

"You're not getting away from me that easily." Inuyasha stated as he held on tight to her waist. Nira tried to struggle free, but to no avail. She soon stopped, turned around, and sang her fangs into her brother's arm. Inuyasha let loose a yelp of pain as Nira raced for the door. She ran through the swinging door and looked behind her to see if she was being followed. As she did she ran into someone and fell backwards onto her tail. She whined a little because of the pain, but soon stared into the eyes of her surprised mother.

"Nira-chan?" Was all her mother got out before Inuyasha burst through the door. Nira had sensed him before hand and jumped out of the way. She ran behind Akina and was doing her best to dodge her older sibling. Akina was trying her best to get them to stop, but soon had to raise her voice. "that's enough!" Both of the children stopped and looked up at their mother. "now, what is going on here!"

"Inu-sama wants to hurt me!" Nira whined.

"No I don't! I only want to give her her birthday beatings!" Inuyasha stated plainly as he reached for her and missed. Nira stuck her tongue out at him as he kept on missing.

"Alright, that's enough now! Inuyasha-kun! You know the rules, not in the house!" Akina scolded. Inuyasha only pouted as he sat down indian style on the floor.

Akina then led her two children back into the dinning room. Inuyasha went and sat back down in his seat, but Nira moved her place to her mother's right side. Inuyasha only gave his younger sibling a glare as he watched from the left side of Akina. Sesshoumaru was the only one who hadn't moved since he sat down.

The door opened one more time to reveal Inutasho, the great general himself. He smiled as he saw his family sitting down and enjoying their food. He came around the table and greeted his children a good morning. He then came upon his wife and wrapped his arms around her shoulders, giving her a kiss on the cheek.

"And a good morning to you my mate." He whispered in her ear as he sat down next to his daughter. "and how is the birthday girl today?" He asked eyeing his little girl.

"I'm doing great daddy." The young pup chirped as she finished her food.

"Hey! Pop! Don't I get to beat her up today!" Inuyasha yelled down to his father. Inutasho laughed to himself as Nira gave Her brother a nasty glare.

"Of course you do son, but take it outside." Inutasho instructed. Inuyasha jumped up immediately and zoomed down to Nira. He sneaked up behind her, wrapped his arms under hers and held his hands together behind her head. Nira was a little taken aback by this, but struggled nonetheless. This caught Inuyasha by surprise as he backed away from the table. He was doing his best to keep her under control, but he was having some trouble with her feet.

"Hey! Sesshoumaru-senpai! Why don't you come here and give me a hand!" Inuyasha yelled to his brother sipping his tea.

"What's the matter? Can't handle her?" He asked without opening his eyes.

"Not when she's moving around like this!" He shouted as he got kicked in the stomach, he was trying his best not to double over. Sesshoumaru only sighed as he set down his cup. He then zoomed down to where Nira was and grabbed her feet still. This shocked Nira as her brother gave her a smirk.

"Well, it looks like that training is beginning to pay off." Inutasho said as he gave his son a sideways glance. Sesshoumaru only huffed as he helped carry her outside. Akina laughed as she got up and entered the room on the fireplace side. It was a library filled to the brim with books on everything. She made her way to a large window and watched her children play in the grand yard. Inutasho came up behind her, wrapped his arms around her waist, and looked with her.

"She sure is fast." Akina stated plainly as Nira avoided one of her brothers. Obviously, she had gotten lose and was now trying to avoid her brothers attempts to corner her.

"You are tense. What is bothering you?" Inutasho asked as he felt her muscles contract.

"It's just that" She turned towards him, "are you sure that it's time for Nira to start her training?" She asked very quickly as she stared into the beautiful eyes that she had fallen in love with.

"Yes, I am quite sure my mate." He answered confidently.

"But how can you be . . . " She was cut off as he laid a finger on her soft lips. He gave her a look and she understood, it was indeed time.

Just as the mountains were swallowing up the sun, Akina entered the backyard and yelled for the children. They came walking back covered in scratches and mud. Akina did her best to hold in her laugh as she saw them.

"Why don't you all go upstairs and wash up for dinner?" She suggested as she held open the door for them. "Oh, and my son's don't forget to bring down your present's for your sister!" She yelled after them as they were already up the stairs and heading for their rooms.

Nira quickly washed up and hurried downstairs for she was famished. The castle was now glowing with chandeliers as the sun had completely disappeared. It was creepy but also comforting in a way. Her footsteps echoed off the grand walls as she rushed to the dinning room. When she got there she saw her mother and father in place, but not her siblings. She figured that they were taking their time as usual so she plopped down in her spot next to her mother.

Her father sat in the big chair at the left end, Akina to his left. Nira's spot was always next to Akina as the boys sat on the opposite, the eldest sitting next to Inutasho. A grand feast was already set out on the table especially for Nira, it had all her favorites as well as dessert. Nira could feel her mouth water as she gazed at the tasty morsels. She was about to reach for some rice when she was stopped.

"Nira Shizuki! Where are your manners! You know the rules! You will wait until everyone is at the table before you eat; or do you want what happened last time, and on your birthday!" Akina scolded as Nira put down her chopsticks. She sat back and pouted as she could only stare at the food. She disliked this rule very much, especially when she was hungry.

Unfortunately, she didn't have a choice, otherwise she would have to sit and watch everyone else eat. She also couldn't leave until everyone was done and gone. This had only happened to her once before, and she could still remember Inuyasha taking his sweet time as he savored the food with each bite. Nira's stomach growled as she remembered her punishment and begged her brothers to hurry up.

No sooner said then done, both of the boys came into the dinning room carrying their sister's gifts. Nira had forgotten her hunger for a second as she gazed upon her gifts. The two boys sat them down next to the fireplace and went to sit in their spots. Inutasho then proposed a toast to his daughter and they began to feast.

After the meal, everyone rose and gathered in front of the fireplace. The two parents sat in chairs that were next to each other, the two youngest sat on the floor, and the eldest leaned against a near by wall. Nira looked over her three big presents as she couldn't decide which one to open. She finally chooses a long rectangular box that was heavy.

"That one's from your mother and me." Her father said as he broke through the silence. Nira had already guessed that it was her weapon, but she was surprised nonetheless. She hadn't counted on it being so beautiful to behold. Inside of the box laid two katanas shinning in their sheaths.

"Are . . . are they really mine!" She asked as she was trying to find her voice again. Inutasho nodded as she began to take them out of the box. She unsheathed them and was amazed at the craftsmanship. Her father only chuckled as he stood up and walked towards her. He knelt down behind her and placed his hands on top of hers.

"These are your swords now Nira, your protection. You need to understand that you will be put into a situation where neither me, your mother, or your brothers will be able to help you. These swords were made and sworn to protect you no matter what, and they will. You have a power deep within you my daughter and they will help you to unlock and control it." He explained.

"But what is my power?" Nira asked curiously.

"You'll need to find that out for yourself my little pup. For it will also help you to harness the sword's power as well. These katanas contain each of your parent's fangs. Tasho," he said holding up the left one, "has your mother's. Tusho has mine." He explained holding up the right one. "When both of them come together!" He yelled a bit as he guided his daughter in swinging the swords together, locking them at the base ends. "They form Tatusho!" He announced as the two blades glowed and grew into two curved fangs.

Nira was in shock as she could see and feel the swords at their full power. Inutasho then let go of his daughter as she held her gift with glory. Soon the swords reverted back and unsnapped each other. Nira then sheathed them and gave her parents a hug and a kiss each, thanking them.

"Open mine next! Open mine next!" Inuyasha shouted getting her attention away from their parents. Nira had no idea what Inuyasha had gotten her, but she knew it was either something really cool or a trick. She cautiously opened the large square box and saw black fur. She looked from her brother, to her parents, and back to the box as she pulled it out.

It was new battle armor! It had shoulder covers with black fur on top, breast plate and torso going down to her waist, armor plated skirt that extended down to her knees covered with fur, leg warmers with armor and fur, and also black material that extended down her arms and legs to protect the skin that was showing.

"So you finally got me a new one after damaging my old one?" She smirked jokingly at her brother.

"Nah, I only destroyed your old one so I could get you this one." He joked back. "This one is better though, the material can with stand wind, rain, snow, heat, fire, and poison." Nira nodded her head in approval.

"Thank you Inu-sama!" She said as she hugged him. She then turned to the last present; it was a 3-D rectangle with a cover over it. As she got closer, she could hear something rattling inside. Nira looked up at her brother, he nodded and she swiped off the cover. It was a tank of some kind with a black blob in it running around like crazy. She looked closer and could see that it was a tarantula.

"Why is it dashing around like that?" She asked Sesshoumaru.

"He doesn't like to be cooped up like that, he's not use to it." He explained as Nira looked at the spider again.

"Sesshoumaru! What did I tell you about bringing animals home to keep?" Inutasho sternly asked.

"Don't worry father, it's perfectly harmless. Besides, he's a good friend for Nira." By this time, Nira had stuck her hand inside the tank and laid it flat on the ground. The tarantula came towards her hand and slowly got on after making sure that it was sturdy. It then began to crawl up her arm towards her shoulder. She lightly laughed as the hairs tickled her. It reached her shoulder and then began to cuddle her neck and purr loudly.

"I didn't know they could do that!" She asked surprised.

"That's because it's no ordinary spider, it's an Arcumantulas." He explained confidently.

"A what! Sesshoumaru! Do you know how big those things can get!" Inutasho yelled at his son just thinking about it.

"Relax! It's not full, it has demon blood as well which means that it can control its size. It's also useful because he's very protective, he'll literally put his life on the line for her." Sesshoumaru said.

"Fine then." Was all that Inutasho could say as he watched his daughter playing with her new friend.

"Thanks big brother!" She announced as she hugged him. "I think that I'll call you . . . Jin!" Jin purred even louder at the sound of his name. Nira then let out a yawn that she was trying to hold back.

"Well, I think that someone needs to go to bed." Akina said as she got up, went over to Nira, and picked her up. Nira rested her head on her mothers shoulder as she was already drifting off to sleep. Inutasho was the last to leave the room as some imps came in to put out the fire and to carry up Nira's presents.

Akina entered her daughter's room and laid her down in bed. She tucked her in and kissed her good night as Jin found a place above her head to sleep. Inutasho then came in along with his son's to do the same. They then left and went to their separate rooms.

A few hours later a stranger came upon the castle. He was a big archway frame covered in gray fur. He hid in the trees surveying his situation looking for the guards. When the coast was clear enough he leapt about 150 feet from his spot onto the castle roof. He made no noise as he landed gracefully hidden by the shadows.

He then began to go around and look into each of the windows, searching for his prey. He avoided the air guards as he finally came upon her, she was asleep in her bed. He half-smiled showing his full demon fangs.

"Hello birthday girl! Now it's time to give you my present. The great honor of meeting the one who will become the most powerful demon in the world! And if you're lucky, you will rule with me." He growled deep in his throat as his eyes flashed red. He then slipped in his claw nail and unlocked the window.